Books like 'Portal'
Readers who enjoyed Portal by Kristen Painter & Bruno Miller also liked the following books featuring the same tropes, story themes, relationship dynamics and character types.
sc-fi military, war & conflict dystopia space-opera cyborgs post-apocalyptic aliens military first-contact soldiers
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Remnant Faction by Glynn Stewart
Rated: 4.55 of 5 stars · 11 ratingsIt is the first and final duty of any warship to put herself between the innocent... and the enemy.Henry Wong and Sylvia Todorovich have gathered the interstellar powers of the Ra Sector into a tentative alliance—an alliance that is tested by the return of the Sector’s former rulers: the Kenmiri Remnant... -
![Empire by Joshua Dalzelle]()
Empire by Joshua Dalzelle
Rated: 4.63 of 5 stars · 8 ratingsThe final fight for control of humanity begins now.The United Terran Federation is on the brink of collapse after a devastating attack by the Eastern Star Alliance that has left four planets depopulated and uninhabitable. Terrified member worlds are fleeing from the Federation and the remnant of their once-mighty fleet has retreated to the last place they are welcome: Earth... -
![Old Dogs, Older Tricks by Jamie McFarlane]()
Old Dogs, Older Tricks by Jamie McFarlane
Rated: 4.42 of 5 stars · 24 ratingsHe’s a Vietnam vet, with a new lease on life. To fight an out-of-this-world invasion, he’ll need a little help from his friends…Albert Jenkins never cared much for bureaucrats and politicians. So when the Galactic Congress refuses to act on the illegal invasion of Earth by parasitic aliens, he does what any self-respecting vet would do – he steals a spaceship...Categorized as:
aliens colonization first-contact invasion military soldiers space-opera action-adventure -
![Federation Marine: Recruit by Jonathan P. Brazee, Jonathan P. Brazee]()
Federation Marine: Recruit by Jonathan P. Brazee, Jonathan P. Brazee
Rated: 4.50 of 5 stars · 8 ratingsPreviously published as “United Federation Marine Corps”, now updated and re-edited. What would you do to change your life? How far would you go? How hard would you fight?Rather than work his bones into dust toiling away on a barren world, Ryck Lysander chooses to enlist in the Federation Marine Corps.But as he quickly finds out, this path isn't just a job. . . it's a calling. . -
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![Junkyard Veterans by Jamie McFarlane]()
Junkyard Veterans by Jamie McFarlane
Rated: 4.53 of 5 stars · 17 ratingsWith a price on their heads, grumpy old vets will risk everything to bring alien assassins to justice.Someone is killing off the old team of vets who repelled Earth’s first Korgul invasion. With the end of a war precious few even knew was happening, life’s been peaceful... -
![The Xaros Reckoning by Richard Fox]()
The Xaros Reckoning by Richard Fox
Rated: 4.43 of 5 stars · 21 ratingsThe final battle begins.The Xaros Masters destroyed Bastion, the Alliance against the alien invaders has failed. Earth stands against the full force of the enemy's unending drone fleets.With their backs against the wall, Captain Valdar and the Breitenfeld must lead a last ditch mission to end the war against the Xaros... -
![Into the War by James Rosone]()
Into the War by James Rosone
Rated: 4.44 of 5 stars · 20 ratingsHumanity stumbles into a galactic war……a war of survival, a conflict with no endEarth has united under the banner of the Republic. Humanities brightest minds have deciphered the secrets to the alien technology and begin to reverse engineer it. An elder race takes notice of humanities strides and intervenes... -
![Vigilance by Ken Lozito]()
Vigilance by Ken Lozito
Rated: 4.33 of 5 stars · 12 ratingsThey’ve spent years exploring this world, but they were living on borrowed time. Only they didn’t know it. Six months ago, Connor learned what the alien race that populated New Earth feared—a mysterious enemy who nearly brought about the collapse of an entire civilization. To help the colony prepare for this new threat, Connor rejoins the Colonial Defense Force... -
![To the Stars by Raymond L. Weil]()
To the Stars by Raymond L. Weil
Rated: 4.33 of 5 stars · 12 ratingsIn a desperate battle, Earth has temporarily freed itself from the clutches of the deadly Trellixian Empire. Billions are dead and it's only a matter of time before the enemy return. Seeking aid against the Trellixians, two exploration ships are sent out to search the galaxy for allies. If they fail, then the Human race is doomed...Categorized as:
aliens colonization dystopia first-contact invasion military post-apocalyptic soldiers -
![Into the Battle by James Rosone]()
Into the Battle by James Rosone
Rated: 4.35 of 5 stars · 24 ratingsMankind has awakened a monster……Humanity must put aside its own animosities……or face extinctionThe origins of human history begin to unravel as Earth learns they are not the only humans in the galaxy. The sudden discovery of humans living on multiple planets beyond Earth has created more questions than it’s answered... -
![Hell's Rejects, Books 1-4 Box Set by M.R. Forbes]()
Hell's Rejects, Books 1-4 Box Set by M.R. Forbes
Rated: 4.56 of 5 stars · 13 ratingsMillion-copy bestseller M.R. Forbes presents the first four books in the best-selling Chaos of the Covenant series...When the Earth Republic is savagely attacked, they recruit the universe’s most dangerous minds to retrieve their stolen warships... -
![Drake's Drum by Christopher G. Nuttall]()
Drake's Drum by Christopher G. Nuttall
Rated: 4.50 of 5 stars · 6 ratingsHumanity is on the ropes. Despite military victories, the sheer grinding power of the alien virus is taking its toll. The space navies are pushed to the limit, the colony worlds are fighting a desperate war against the infected, the economy is on the brink of utter collapse and Earth herself has come under attack. But there is one ray of hope... -
![Shout of Honor by Sharon Lee, Steve Miller]()
Shout of Honor by Sharon Lee, Steve Miller
Rated: 4.50 of 5 stars · 6 ratingsCommander Vepal is a Hero. He is also the Yxtrang ambassador to the greater universe. These two facts do not make Vepal's life easy. But they do make it interesting... -
![Planet Fall by Toby Neighbors]()
Planet Fall by Toby Neighbors
Rated: 4.50 of 5 stars · 6 ratingsThe highly anticipated conclusion to the Kestrel Class Saga is here.The crew of the Modulus Echo are trapped on the planet Gershwin. The Krah Empire has returned with overwhelming force, and the Royal Imperium fleet is divided by petty rivalries and opposing political views. The path to victory is clear - close the worm hole, defeat the aliens, and retake what has been lost... -
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![Star Force: Maty by Aer-ki Jyr]()
Star Force: Maty by Aer-ki Jyr
Rated: 4.50 of 5 stars · 6 ratingsThe universe is not predictable, no matter how much experience you gain. You may delude yourself into thinking so...until the universe educates you otherwise in dramatic fashion... -
![Sector Seventeen by S.J. MacDonald]()
Sector Seventeen by S.J. MacDonald
Rated: 4.50 of 5 stars · 6 ratingsFor centuries, there have been glimpses of something very strange and very fast in the turbulent space beyond Telathor, known to spacers as the Space Monster of Sector Seventeen. Now the Fourth is sent to investigate the Phenomenon under orders never to use the M word – nobody, after all, wants to be on record as the person who sent warships to hunt for a space monster... -
![Acheron Redemption by Ken Lozito]()
Acheron Redemption by Ken Lozito
Rated: 4.50 of 5 stars · 6 ratingsSentinel warships were the answer to the Federation Wars. They brought peace and stability....or so they thought.The Sentinels are a menace, terrorizing spacers across the galaxy in their hunt. But change is coming, and spacers across the galaxy will have to choose whether to fight for their future or not...Categorized as:
aliens colonization first-contact invasion military soldiers space-opera action-adventure -
![Beyond the Great Dying by N.S. Austin]()
Beyond the Great Dying by N.S. Austin
Rated: 4.50 of 5 stars · 6 ratingsThis is an alternate cover edition for ASIN: B073ZW5F7Z In Beyond the Great Dying, Novelist NS Austin blends science fiction, humor, hope and gritty, realistic characters to create a post-apocalyptic world that is both strange and all too believable. Political intrigue, romance and unusual creatures combine to deliver an action-packed adventure for the last surviving humans on earth... -
![Star Force: Reclaimers by Aer-ki Jyr]()
Star Force: Reclaimers by Aer-ki Jyr
Rated: 4.50 of 5 stars · 6 ratingsDoes Star Force have enough races in it yet? No...not even close... -
![The Last Revocater by G.J. Ogden]()
The Last Revocater by G.J. Ogden
Rated: 4.50 of 5 stars · 6 ratingsThe Last Revocater is book five of the Star Scavenger Series. A thrilling space opera adventure with the mystery and adventure of Indiana Jones. With Goliath continuing its rampage through the network of portal worlds, Hudson Powell and Tory Bellona go on with their search for Logan Griff and the crystal. But first they must embark on a final, dangerous relic hunt inside a crashed alien wreck... -
![Junkyard Raiders by Jamie McFarlane]()
Junkyard Raiders by Jamie McFarlane
Rated: 4.59 of 5 stars · 12 ratingsDumped on a backwater planet, heroic old vets will risk everything to take a stand against vicious alien invaders.On the pastoral, backwater planet of Fimil Alpha, something or someone is eradicating the tribespeople of the Gauder Plains. Back on Earth, Albert Jenkins and his crew are enjoying the short-lived fame that accompanied their last adventure...Categorized as:
aliens colonization first-contact invasion military space-opera action-adventure adult -
![Damnation by M.R. Forbes]()
Damnation by M.R. Forbes
Rated: 4.69 of 5 stars · 10 ratingsThe enemy is everywhere. Our existence hangs by a thread.On Earth we’re dying - the ships have landed.On Proxima we’re ignorant - the sabotage nearly complete.Our strongholds are routed.Our defenses crippled.Our wills are broken.Our hope is gone...… or is it?Three heroes.Two battlefronts.One desperate chance for victory...Categorized as:
aliens dystopia first-contact invasion military post-apocalyptic soldiers space-opera -
![Galactic Judge by J.N. Chaney, James S. Aaron]()
Galactic Judge by J.N. Chaney, James S. Aaron
Rated: 4.43 of 5 stars · 7 ratingsVigilante justice is on the rise.Criminal attacks across Taurus Station have left the casinos, clubs and heavy industry in freefall.Deputy Gage Walker is sent on a mission to stop attacks on local mining rigs. On the edges of a vicious space battle, Walker finds a criminal operation beyond anything the local law had imagined... -
![Void Horizon by J.N. Chaney, Christopher Hopper]()
Void Horizon by J.N. Chaney, Christopher Hopper
Rated: 4.38 of 5 stars · 8 ratingsAn enemy with otherworldly powers. A war fueled by insatiable bloodlust. No one will be spared. Following their first victory against a rogue unit of Repub Marines, Magnus finds his newly trained gladias pinned down by a squadron of Talons...Categorized as:
aliens colonization first-contact invasion military soldiers space-opera action-adventure -
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![The Long-Range War by Christopher G. Nuttall]()
The Long-Range War by Christopher G. Nuttall
Rated: 4.38 of 5 stars · 8 ratingsThe gloves have finally come off ... The Tokomak, the unquestioned masters of the galaxy, have dispatched a massive fleet to crush the Solar Union - and the fledgling Galactic Alliance - before the human race and its alien allies can tear the galactic order asunder. Hundreds of thousands of starships under the command of an alien tactical genius, bent on exterminating the entire human race .. -
![Halo: Renegades by Kelly Gay]()
Halo: Renegades by Kelly Gay
Rated: 4.38 of 5 stars · 8 ratingsAn original full-length novel set in the Halo universe and based on the New York Times bestselling video game series!Find. Claim. Profit. In a post-Covenant War galaxy littered with scrap, it’s the salvager’s motto—and Rion Forge certainly made her mark on the trade... -
![Return Fire by Rick Partlow]()
Return Fire by Rick Partlow
Rated: 4.52 of 5 stars · 13 ratingsEarth is in turmoil.The enemy is bearing down on us with every warship they have, and our only allies are in chaos.Our one hope for survival is Andy Clanton - a hack science fiction writer trying to convince some aliens that humans are worth saving.It’s an uphill battle, because to the aliens, we are the monsters... -
![Bastion of the Reaper by J.N. Chaney, Scott Moon]()
Bastion of the Reaper by J.N. Chaney, Scott Moon
Rated: 4.60 of 5 stars · 11 ratingsHalek Cain has one chance to save the people he loves.The Alon Empire has redoubled its efforts to conquer Yansden and strip the planet bare. Their massive fleet devours every star system it encounters. They demand total surrender and show no mercy. The Neverseen are rising from the forests, oceans, and desert wilderness and thirsty for blood... -
![Destruction by M.R. Forbes]()
Destruction by M.R. Forbes
Rated: 4.30 of 5 stars · 10 ratingsThe Deliverance isn’t alone.That’s not a surprise. The planet was chosen for a reason.But the situation is more dire than Caleb ever imagined. The enemy he’s encountered isn’t the enemy he was seeking, and the conflict is expanding in ways he can barely conceive... -
![The Alliance by Raymond L. Weil]()
The Alliance by Raymond L. Weil
Rated: 4.30 of 5 stars · 10 ratingsA mission to free a world from the Kleese has gone terribly wrong. Lieutenant Ryan Nelson and his Marines are trapped with no hope of rescue. On the Kleese home world, a division grows between the regular Kleese and the militaristic Zaltule. The war against the Kleese intensifies as the human led Alliance attempts a daring attack against the heart of the Kleese Empire...Categorized as:
aliens colonization first-contact invasion military post-apocalyptic soldiers space-opera -
![Insurrection by Raymond L. Weil]()
Insurrection by Raymond L. Weil
Rated: 4.30 of 5 stars · 10 ratingsThe final battle between the Humans and the Zaltule is drawing near. However, the Arachnids have a secret that will ensure victory and allow them to wipe out the Human race once and for all.In the Strell Empire, former Supreme Overlord Xatul plans his return. He has amassed a fleet to take back control of the Kleese Empire...Categorized as:
aliens colonization first-contact invasion military post-apocalyptic soldiers space-opera -
![Galactic Breach by J.N. Chaney, Christopher Hopper]()
Galactic Breach by J.N. Chaney, Christopher Hopper
Rated: 4.30 of 5 stars · 10 ratingsA city on the brink of war. Marines held hostage by merciless warlords. After Lieutenant Magnus awakes from the orbital strike that nearly killed him, he discovers that a small contingent of his Marine platoon has also survived. Hope glimmers as he devises a plan to rescue them. But when Magnus learns that his men are being held hostage by a deadly tribe, he fears the worst... -
![The Dregs of Empire: A Tale of the Sun Eater by Christopher Ruocchio]()
The Dregs of Empire: A Tale of the Sun Eater by Christopher Ruocchio
Rated: 4.30 of 5 stars · 10 ratingsRETURN TO THE WORLD OF THE SUN EATER IN THIS SPIN-OFF ADVENTURE SET AFTER THE EVENTS OF BOOK FIVE!For thousands of years, the icy planet of Belusha has served the galactic Sollan Empire as its most notorious prison planet... -
![Junkyard Pirate by Jamie McFarlane]()
Junkyard Pirate by Jamie McFarlane
Rated: 4.27 of 5 stars · 27 ratingsKnocking at death’s door. Bargaining for a second chance. Seems like a heck of a way to find out about an alien invasion… Vietnam vet Albert Jenkins is battling a bulging waistline and a passion for drink. So when a towering pile of scrap rocket parts falls and crushes the stubborn curmudgeon, he thinks it’s finally the end... -
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![Into the Chaos by James Rosone, T.C. Manning]()
Into the Chaos by James Rosone, T.C. Manning
Rated: 4.44 of 5 stars · 15 ratingsA terrible massacre was discovered……Did the same fate befall Sumer?Captain Brian Royce brings Hadad to his home planet, which shows obvious signs of battle. Did any of his family survive?Where are all the children…did the Zodarks take them?Admiral Miles Hunt finds himself appointed to a new position beyond his current skillset... -
![The Shadow Quintet by Orson Scott Card]()
The Shadow Quintet by Orson Scott Card
Rated: 4.56 of 5 stars · 11 ratingsThis set contains Orson Scott Card's Ender's Shadow, Shadow of the Hegemon, Shadow Puppets, Shadow of the Giant, and Shadows in Flight.At the publisher's request, this title is being sold without Digital Rights Management software (DRM) applied... -
![No Way Back by M.R. Forbes]()
No Way Back by M.R. Forbes
Rated: 4.61 of 5 stars · 10 ratingsA Sheriff Duke StoryWhen the going gets tough, Sheriff Duke gets tougher. He’ll have to if he’s going to survive long enough to see justice done. The monsters infecting the forgotten Earth don’t sleep, and neither can he. There’s no time to rest. There’s no time to recover... -
![Into the Chaos by James Rosone, T.C. Manning]()
Into the Chaos by James Rosone, T.C. Manning
Rated: 4.44 of 5 stars · 14 ratingsA terrible massacre was discovered……Did the same fate befall Sumer?Captain Brian Royce brings Hadad to his home planet, which shows obvious signs of battle. Did any of his family survive?Where are all the children…did the Zodarks take them?Admiral Miles Hunt finds himself appointed to a new position beyond his current skillset... -
![Hunt of the Reaper by J.N. Chaney, Scott Moon]()
Hunt of the Reaper by J.N. Chaney, Scott Moon
Rated: 4.53 of 5 stars · 11 ratingsOnly a miracle can save Cain’s people from the combined assault of the Alon and the Sansein fleets. His friends believe there is a super weapon capable of driving back their enemies but he has his doubts. To make things worse, a new rival now hunts Cain with a vengeance even as everything is falling apart... -
![Descent of the Reaper by J.N. Chaney, Scott Moon]()
Descent of the Reaper by J.N. Chaney, Scott Moon
Rated: 4.51 of 5 stars · 11 ratingsHumanity’s last chance for survival lies on a quarantined planet deep in enemy space. Not even the exodus fleet’s ancient enemies dare set foot on the surface. When Cain's friends make a daring assault on the dormant shipyard of an ancient civilization, he's soon confronted with a nightmare made real... -
![The Forgotten Empire: The Confederation and The Empire at War by Raymond L. Weil, Julie Weil Thomas]()
The Forgotten Empire: The Confederation and The Empire at War by Raymond L. Weil, Julie Weil Thomas
Rated: 4.43 of 5 stars · 13 ratingsFrom USA Today best-selling author Raymond L. Weil, and his daughter Julie, comes the fifth book in his newest military science fiction series.The war between the Human Empire and the Confederation has reached a turning point as the Humans are now poised to attack the Confederation in their own area of space. Few Humans have ever entered the Confederation and returned alive... -
![Declaration by M.R. Forbes]()
Declaration by M.R. Forbes
Rated: 4.50 of 5 stars · 11 ratingsSERIES FINALE! The Deliverance is on the brink of destruction. The planet is more dangerous than anyone realized - the crossroads of a war millennia in the making - and the colony is Ground Zero. But the courage of a few can move mountains, and the fight isn’t lost yet. The enemy thinks they have Caleb right where they want him. They ought to think again... -
![Attack Plan Alpha by Jay Allan]()
Attack Plan Alpha by Jay Allan
Rated: 4.46 of 5 stars · 12 ratingsA battle is coming, the greatest the Rim has seen in ten thousand years, a fight for freedom, for the future, for the very survival of all humanity holds dear. Tyler Barron and his comrades are ready for their greatest test, but even as they prepare to hold the line at Fortress Striker, to turn back the Highborn’s imminent attack, the enemy have opened another front, one far to the rear...Categorized as:
aliens colonization dystopia first-contact invasion military post-apocalyptic soldiers -
![Phantom Deadfall by Christopher Hopper, J.N. Chaney]()
Phantom Deadfall by Christopher Hopper, J.N. Chaney
Rated: 4.53 of 5 stars · 10 ratingsThe gods have been angered.Hell will rain down.After Wic and the Phantom’s successful operation on Karkin Four, the team learns of the enemy’s plans for a swift retaliation: an all-out assault on New York City.Together, Wic must rally the team’s resources to plan an emergency counterassault that will push the Phantoms to their limits... -
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![Spartan Valor by Toby Neighbors]()
Spartan Valor by Toby Neighbors
Rated: 4.33 of 5 stars · 6 ratingsOnly the strong survive on the hostile planet of Apex Venandi. Space Marine Orion Porter is stranded with his Master Sergeant “Money” Eubanks and the injured Staff Sergeant Barnes. Surrounded by hostile natives, and running out of resources, their only hope is the return of the Fleet. Their call for help was beamed into space, but no reply has come... -
![The Lion and the Unicorn by Christopher G. Nuttall]()
The Lion and the Unicorn by Christopher G. Nuttall
Rated: 4.33 of 5 stars · 6 ratingsThe war isn’t going well.In five years of heavy fighting, humanity and its alien allies have steadily been pushed back towards Earth, towards the very heart of humanity itself. The virus is steadily wearing the defences down, mounting campaign after campaign to infect and enslave every other alien race... -
![Interstellar War by G.P. Hudson]()
Interstellar War by G.P. Hudson
Rated: 4.33 of 5 stars · 6 ratingsA homeland in ashes. A merciless ancient enemy. A vicious new foe. A galaxy convulsing with war. With humanity on the brink of annihilation, only one option remains, Interstellar War. Can Jon Pike achieve victory, and revenge, for himself and humanity? Find out in Interstellar War, Book 5 of The Pike Chronicles...Categorized as:
aliens colonization first-contact invasion military soldiers space-opera action-adventure -
![Ronin by Edward W. Robertson]()
Ronin by Edward W. Robertson
Rated: 4.33 of 5 stars · 6 ratingsThe Hive has survived their first fleet action against FinnTech. But in the process, they've lost the Hive itself. With their manufacturing base in Finn's hands, it's only a matter of time before they're outnumbered and destroyed. As Rada searches for a path to victory, she stumbles on a horrifying secret: the aliens who've kept humanity confined to the Solar System are about to make their move... -
![Earth Machines by Daniel Arenson, Jeffrey Kafer]()
Earth Machines by Daniel Arenson, Jeffrey Kafer
Rated: 4.33 of 5 stars · 6 ratingsMachines. They fly our starships. Mine our asteroids. Connect us to one another. They serve us without question. But what if the machines rebelled? We call it the Singularity. The day the machines wake up. A day that can destroy humanity. Marco and Addy are heroes, veterans of the Alien Wars. Today they are civilians, married, and peacefully raising a family. That peace will soon shatter... -
![Earth Aflame by Daniel Arenson, Jeffrey Kafer]()
Earth Aflame by Daniel Arenson, Jeffrey Kafer
Rated: 4.33 of 5 stars · 6 ratingsThe Singularity has come. The machines have risen. Our robots, once loyal servants, now slaughter us. Our cars, planes, and starships have become machines of death. Cyborgs roam the land, deforming humans, growing their twisted army. Is a heartless, mechanized hell our future? A faint hope shines. Heroes still fight. Famous names. Einav. Marco. Addy. Lailani. The heroes of the Alien Wars...
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