Best Aliens Games Under $20
The 25 highest-rated aliens games you can get for under $20, ranked by Steam reviews, with the cheapest key across 21 stores.
- #196% of 5,941 Steam reviews
2016Earth Defense Force 4.1: The Shadow of New Despair
$19.99 -87%$2.42difmark & 24 storesActionThird-Person ShooterCo-opSteam96%Achieve51DeckgoldView All Prices$19.99 -87%$2.42difmark & 24 stores - #297% of 2,484 Steam reviews
1994X-COM: UFO Defense
$4.99 -98%$0.09GameSeal & 19 storesStrategyClassicTurn-Based StrategySteam97%DeckgoldView All Prices$4.99 -98%$0.09GameSeal & 19 stores - #395% of 6,240 Steam reviews
2025Species: Unknown
$9.99 -20%$7.99steam & 2 storesHorrorOnline Co-OpFirst-PersonSteam95%DeckplatinumView All Prices$9.99 -20%$7.99steam & 2 stores - #497% of 1,355 Steam reviews
- #594% of 6,550 Steam reviews
2020Destroy All Humans!
$29.99 -84%$4.70driffle & 23 storesActionAdventureVillain ProtagonistSteam94%Achieve40DeckplatinumView All Prices$29.99 -84%$4.70driffle & 23 stores - #692% of 26,961 Steam reviews
2014Alien: Isolation
$39.99 -91%$3.37k4g & 32 storesHorrorSurvival HorrorSci-fiSteam92%Achieve50DeckplatinumView All Prices$39.99 -91%$3.37k4g & 32 stores - #795% of 866 Steam reviews
2003Alien Shooter
$4.99 -1%$4.93gamivo & 9 storesGoreShooterActionSteam95%Achieve17DeckplatinumView All Prices$4.99 -1%$4.93gamivo & 9 stores - #890% of 8,166 Steam reviews
2010Aliens vs. Predator
$14.99 -80%$2.92driffle & 31 storesActionFPSAliensSteam90%Achieve50DecksilverView All Prices$14.99 -80%$2.92driffle & 31 stores - #999% of 106 Steam reviews
![[Herror] Gas Station Case game key cover art](//images.igdb.com/igdb/image/upload/t_cover_big/coctl6.webp)
2026[Herror] Gas Station Case
$5.99 -61%$2.29kinguin & 6 storesHorrorPsychological HorrorAtmosphericSteam99%Achieve11View All Prices$5.99 -61%$2.29kinguin & 6 stores - #1093% of 260 Steam reviews
2017Swarm Queen
$7.49 -85%$1.09eneba & 3 storesRTS2.5DAliensSteam93%Achieve55DeckpendingView All Prices$7.49 -85%$1.09eneba & 3 stores - #1188% of 1,580 Steam reviews
2022Crysis 3 Remastered
$29.99 -92%$2.14k4g & 7 storesActionFPSShooterSteam88%Achieve37DeckplatinumView All Prices$29.99 -92%$2.14k4g & 7 stores - #1290% of 615 Steam reviews
1997X-COM: Apocalypse
$4.99 -88%$0.58driffle & 15 storesStrategySci-fiTurn-BasedSteam90%DeckgoldView All Prices$4.99 -88%$0.58driffle & 15 stores - #1390% of 581 Steam reviews
2006Alien Shooter 2: Reloaded
$4.99 -80%$0.99indiegala & 12 storesAliensShoot 'Em UpLooter ShooterSteam90%DeckplatinumView All Prices$4.99 -80%$0.99indiegala & 12 stores - #1488% of 1,018 Steam reviews
2021Buggos
$9.99 -50%$4.96kinguin & 10 storesRTSStrategyVillain ProtagonistSteam88%Achieve25DeckplatinumView All Prices$9.99 -50%$4.96kinguin & 10 stores - #1588% of 402 Steam reviews
2018Quarantine Circular
$5.99steamVisual NovelChoose Your Own AdventureText-BasedSteam88%Achieve18DeckplatinumView All Prices$5.99steam - #1694% of 54 Steam reviews
2025Aquabike Rush
$39.99 -95%Historic Low $1.99steamActionAdventureCasualSteam94%View All Prices$39.99 -95%Historic Low $1.99steam - #1783% of 14,348 Steam reviews
2021Aliens: Fireteam Elite
$29.99 -80%Historic Low $5.99steam & 25 storesCo-opShooterAliensSteam83%Achieve46DeckplatinumView All Prices$29.99 -80%Historic Low $5.99steam & 25 stores - #1885% of 524 Steam reviews
2025Void Miner
$5.99 -53%$2.76kinguin & 2 storesIncrementalRogueliteBullet HellSteam85%Achieve11DeckpendingView All Prices$5.99 -53%$2.76kinguin & 2 stores - #1984% of 569 Steam reviews
- #2087% of 113 Steam reviews
2022Biota
$9.99 -67%Historic Low $3.29steam & 1 store2D PlatformerAliensRetroSteam87%Achieve24DeckgoldView All Prices$9.99 -67%Historic Low $3.29steam & 1 store - #2187% of 106 Steam reviews
2023Battle Grid
$5.99 -62%$2.27kinguin & 1 storeMechsBullet HellRogueliteSteam87%Achieve35View All Prices$5.99 -62%$2.27kinguin & 1 store - #2282% of 563 Steam reviews
2005Shadowgrounds
$6.99 -91%$0.58kinguin & 18 storesTop-Down ShooterSci-fiAliensSteam82%DeckgoldView All Prices$6.99 -91%$0.58kinguin & 18 stores - #2386% of 84 Steam reviews
2022IFO
$3.99steam & 1 storePuzzleAliensPoint & ClickSteam86%Achieve4View All Prices$3.99steam & 1 store - #2486% of 84 Steam reviews
- #2578% of 6,589 Steam reviews
2014Galactic Civilizations III
$29.99 -91%$2.56gamivo & 26 storesAliensSci-fi4XSteam78%Achieve102DeckgoldView All Prices$29.99 -91%$2.56gamivo & 26 stores
![[Herror] Gas Station Case game key cover art](http://images.igdb.com/igdb/image/upload/t_cover_big/coctl6.webp)
KrakenKeys
Find the best prices on Steam games. Our platform makes it easy to compare prices across retailers, helping you save money on everything from popular new releases to indie favourites.
With regularly updated prices and a simple, no-nonsense interface, we make it easy to grow your gaming library without overspending.
Browse
Contact
