Battle Beyond Earth
by Nick S. Thomas
4.17 · 6 ratings
soldiers · aliens · fiction · action-adventure · sci-fi · book · apocalyptic · invasion · adult · violent-conflict · space · audiobook · military · galactic-empire · space-opera
Battle Beyond Earth: Similar series
Legacy Fleet Trilogy
by Nick Webb
4.10 · 89 ratings
action-adventure · supernatural · soldiers · sci-fi · galactic-empire · space-opera · first-contact · space-travel · military · audiobook · adult · space-fleet · space · violent-conflict · invasion · war · book · technothriller · colonization · exploration
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Undying Mercenaries
by B.V. Larson
4.28 · 383 ratings
war · aliens · soldiers · fiction · sci-fi · space-opera · military · violent-conflict · space-fleet · adult · invasion · book · colonization · galactic-empire · audiobook · space · first-contact · space-travel · hard-sci-fi · exploration
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Duchy of Terra Universe
by Glynn Stewart
4.41 · 170 ratings
military · war · book · invasion · aliens · exploration · action-adventure · fiction · galactic-empire · space-travel · space-opera · soldiers · space-fleet · adult · violent-conflict · space · sci-fi · first-contact · audiobook · female-mc
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War Eternal
by M.R. Forbes
4.19 · 151 ratings
invasion · aliens · fiction · space-opera · soldiers · sci-fi · space · adult · space-fleet · military · violent-conflict · book · war · time-travel · action-adventure · first-contact · audiobook · galactic-empire · futuristic · colonization
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Orbs
by Nicholas Sansbury Smith
3.94 · 94 ratings
invasion · post-apocalyptic · dystopia · audiobook · fiction · aliens · apocalyptic · violent-conflict · adult · sci-fi · book · survival · action-adventure · first-contact · horror · colonization · space · suspense · exploration · military
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Chaos of the Covenant
by M.R. Forbes
4.35 · 109 ratings
aliens · fiction · female-mc · adult · violent-conflict · military · space-opera · sci-fi · book · invasion · genetic-engineering · space · audiobook · angels · soldiers · action-adventure · space-fleet · heroic-fantasy · demons · galactic-empire
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Drop Trooper
by Rick Partlow
4.38 · 152 ratings
military · space-fleet · adult · violent-conflict · soldiers · galactic-empire · colonization · aliens · fiction · invasion · book · space · sci-fi · space-travel · action-adventure · exploration · first-contact · space-opera · war · audiobook
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Aurora Rising
by G.S. Jennsen
4.13 · 66 ratings
sci-fi · space-travel · space-opera · first-contact · military · fiction · action-adventure · galactic-empire · cyberpunk · colonization · space-fleet · violent-conflict · aliens · exploration · ai · space · romance · book · soldiers · adult
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Lost Starship
by Vaughn Heppner
4.24 · 155 ratings
military · space-fleet · adult · genetic-engineering · violent-conflict · soldiers · galactic-empire · space-opera · colonization · aliens · fiction · action-adventure · invasion · book · space · sci-fi · audiobook · space-travel · exploration · ai
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Indian Hill
by Mark Tufo
4.49 · 102 ratings
sci-fi · first-contact · adult · violent-conflict · aliens · fiction · post-apocalyptic · invasion · book · soldiers · military · space-travel · space-fleet · exploration · action-adventure · zombies · audiobook · space · colonization · space-opera
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Backyard Starship
by J.N. Chaney
4.57 · 202 ratings
fiction · book · military · violent-conflict · sci-fi · space · space-fleet · soldiers · space-opera · action-adventure · aliens · adult · galactic-empire · colonization · invasion · genetic-engineering · audiobook · pulp · young-adult · ai
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Crimson Worlds Refugees
by Jay Allan
4.29 · 60 ratings
exploration · fiction · soldiers · galactic-empire · sci-fi · space-travel · space-opera · first-contact · audiobook · military · space-fleet · adult · violent-conflict · space · invasion · book · colonization · aliens · action-adventure · war
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Dark World Mates
by Olivia Riley
3.97 · 60 ratings
aliens · fiction · adult · sci-fi · book · romance · action-adventure · female-mc · violent-conflict · first-contact · invasion · alpha-mc · slow-burn · military · space · suspense · paranormal · prison · monsters · space-opera
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AL:ICE
by Charles W. Lamb
4.13 · 46 ratings
aliens · fiction · soldiers · space-opera · sci-fi · audiobook · military · first-contact · litrpg · space · violent-conflict · dystopia · invasion · adult · book · apocalyptic · time-travel · harem · action-adventure · paranormal
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Crimson Worlds
by Jay Allan
4.11 · 172 ratings
fiction · war · violent-conflict · adult · military · sci-fi · book · space · space-opera · soldiers · aliens · space-fleet · audiobook · first-contact · galactic-empire · action-adventure · exploration · invasion · space-travel · colonization
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Earthrise
by Daniel Arenson
4.01 · 136 ratings
aliens · exploration · fiction · military · adult · space-fleet · violent-conflict · soldiers · sci-fi · space-opera · space-travel · colonization · invasion · book · space · galactic-empire · first-contact · audiobook · action-adventure · dystopia
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Forgotten Vengeance
by M.R. Forbes
4.49 · 31 ratings
fiction · aliens · book · invasion · futuristic · post-apocalyptic · space · genetic-engineering · adult · dystopia · military · violent-conflict · first-contact · space-opera · ai · galactic-empire · soldiers · sci-fi · apocalyptic · audiobook
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Ganog Wars
by Chris Fox
4.29 · 24 ratings
cyborgs · invasion · male-mc · space-fleet · book · action-adventure · aliens · exploration · fiction · soldiers · sci-fi · space-opera · space-travel · galactic-empire · military · audiobook · space · violent-conflict · adult
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Dawn of Fire
by Guy Haley
3.97 · 37 ratings
space · exploration · fiction · soldiers · sci-fi · military · space-fleet · adult · violent-conflict · book · genetic-engineering · grim-dark · aliens · action-adventure · first-contact · invasion · colonization · galactic-empire · space-opera · audiobook
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The Clockwork Chimera
by Scott Baron
4.26 · 34 ratings
book · invasion · aliens · fiction · space-opera · sci-fi · adult · space · violent-conflict · apocalyptic · action-adventure · humor · ai · genetic-engineering · first-contact · audiobook · military · time-travel · soldiers · cyborgs
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The Sentinel Trilogy
by Michael Wallace
4.00 · 20 ratings
fiction · soldiers · sci-fi · space-opera · galactic-empire · military · violent-conflict · space · space-fleet · adult · book · aliens · audiobook · invasion · action-adventure · first-contact
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Sethran Kada
by Chris Reher
3.90 · 20 ratings
book · adult · space · violent-conflict · sci-fi · galactic-empire · space-opera · fiction · action-adventure · first-contact · military · audiobook · soldiers · aliens · invasion · genetic-engineering · space-travel · exploration
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The Eurynome Code
by K. Gorman
4.27 · 22 ratings
adult · book · space · fiction · sci-fi · space-opera · military · female-author · violent-conflict · first-contact · space-fleet · colonization · galactic-empire · audiobook · genetic-engineering · female-mc · action-adventure · aliens · soldiers · space-travel
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The Void Queen Trilogy
by Michael Wallace
4.31 · 16 ratings
galactic-empire · space-opera · soldiers · space-fleet · adult · violent-conflict · space · sci-fi · audiobook · military · book · invasion · aliens · fiction · action-adventure · colonization · first-contact · female-mc
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