Cheapest Sci-fi games on Steam

Steam games tagged “Sci-fi” that you can buy as a key at BuyCheapKeys, compared with their Steam price.

-15% vs Steam RRP

Space Haven

Steam RRP€24.99

BuyCheapKeys key€21.20

-44% vs Steam RRP

Gunpoint

Steam RRP€7.00

BuyCheapKeys key€3.90

-70% vs Steam RRP

Sins of a Solar Empire®: Rebellion

Steam RRP€20.49

BuyCheapKeys key€6.10

-76% vs Steam RRP

The Invincible

Steam RRP€29.99

BuyCheapKeys key€7.14

-70% vs Steam RRP

Iron Lung

Steam RRP€7.79

BuyCheapKeys key€2.34

-73% vs Steam RRP

Hyperdimension Neptunia Re;Birth1

Steam RRP€14.79

BuyCheapKeys key€3.98

-3% vs Steam RRP

Supreme Commander: Forged Alliance

Steam RRP€9.99

BuyCheapKeys key€9.70

-24% vs Steam RRP

Stranded: Alien Dawn

Steam RRP€34.99

BuyCheapKeys key€26.49

-92% vs Steam RRP

System Shock

Steam RRP€36.30

BuyCheapKeys key€2.88

-13% vs Steam RRP

Two Point Museum

Steam RRP€29.99

BuyCheapKeys key€26.19

-71% vs Steam RRP

Battlefleet Gothic: Armada 2

Steam RRP€19.99

BuyCheapKeys key€5.78

-89% vs Steam RRP

Planet of Lana

Steam RRP€19.99

BuyCheapKeys key€2.16

-13% vs Steam RRP

Planetbase

Steam RRP€14.79

BuyCheapKeys key€12.80

-80% vs Steam RRP

Shadowrun Returns

Steam RRP€14.99

BuyCheapKeys key€2.95

-84% vs Steam RRP

EARTH DEFENSE FORCE 5

Steam RRP€49.99

BuyCheapKeys key€8.10

-17% vs Steam RRP

REPLACED

Steam RRP€25.36

BuyCheapKeys key€20.99

-90% vs Steam RRP

Starship Troopers: Terran Command

Steam RRP€28.99

BuyCheapKeys key€2.88

-79% vs Steam RRP

The Surge

Steam RRP€14.99

BuyCheapKeys key€3.17

-55% vs Steam RRP

Crysis 2 Remastered

Steam RRP€29.99

BuyCheapKeys key€13.36

-21% vs Steam RRP

Warhammer 40,000: Dawn of War - Anniversary Edition (Classic)

Steam RRP€13.99

BuyCheapKeys key€11.05

-38% vs Steam RRP

OPUS: Echo of Starsong - Full Bloom Edition

Steam RRP€24.50

BuyCheapKeys key€15.24

-57% vs Steam RRP

Halo Wars: Definitive Edition

Steam RRP€19.99

BuyCheapKeys key€8.60

-48% vs Steam RRP

Natural Selection 2

Steam RRP€4.99

BuyCheapKeys key€2.61

-8% vs Steam RRP

Stationeers

Steam RRP€33.99

BuyCheapKeys key€31.27

-57% vs Steam RRP

Quake II

Steam RRP€9.99

BuyCheapKeys key€4.25

-85% vs Steam RRP

The Universim

Steam RRP€27.99

BuyCheapKeys key€4.19

Not on Steam

DOOM 3

Steam—

BuyCheapKeys key€6.42

-62% vs Steam RRP

Supreme Commander 2

Steam RRP€12.99

BuyCheapKeys key€4.97

-86% vs Steam RRP

Galactic Civilizations III

Steam RRP€30.49

BuyCheapKeys key€4.36

-89% vs Steam RRP

Citizen Sleeper

Steam RRP€19.50

BuyCheapKeys key€2.13

-91% vs Steam RRP

Warhammer 40,000: Gladius - Relics of War

Steam RRP€40.86

BuyCheapKeys key€3.56

-41% vs Steam RRP

Forever Skies

Steam RRP€28.99

BuyCheapKeys key€17.10

-84% vs Steam RRP

Warhammer 40,000: Dawn of War II - Anniversary Edition (Classic)

Steam RRP€44.99

BuyCheapKeys key€7.14

-35% vs Steam RRP

5D Chess With Multiverse Time Travel

Steam RRP€9.99

BuyCheapKeys key€6.45

-57% vs Steam RRP

SUPERHOT VR

Steam RRP€22.49

BuyCheapKeys key€9.74

-44% vs Steam RRP

DOOM 64

Steam RRP€4.99

BuyCheapKeys key€2.80

-47% vs Steam RRP

COCOON

Steam RRP€22.99

BuyCheapKeys key€12.19

-93% vs Steam RRP

Bulletstorm: Full Clip Edition

Steam RRP€36.99

BuyCheapKeys key€2.60

-38% vs Steam RRP

FINAL FANTASY VIII

Steam RRP€12.99

BuyCheapKeys key€8.00

-62% vs Steam RRP

Cronos: The New Dawn

Steam RRP€59.99

BuyCheapKeys key€23.08

-78% vs Steam RRP

Aliens: Colonial Marines Collection

Steam RRP€29.99

BuyCheapKeys key€6.67

Not on Steam

System Shock® 2 (1999)

Steam—

BuyCheapKeys key€5.07

-93% vs Steam RRP

Homeworld: Deserts of Kharak

Steam RRP€45.99

BuyCheapKeys key€3.44

-73% vs Steam RRP

EARTH DEFENSE FORCE 4.1 The Shadow of New Despair

Steam RRP€16.79

BuyCheapKeys key€4.59

-84% vs Steam RRP

Crysis 3 Remastered

Steam RRP€29.99

BuyCheapKeys key€4.72

Not on Steam

Warhammer® 40,000: Dawn of War® - Dark Crusade

Steam—

BuyCheapKeys key€26.49

-85% vs Steam RRP

Deliver Us The Moon

Steam RRP€24.99

BuyCheapKeys key€3.63

-85% vs Steam RRP

The Surge 2

Steam RRP€29.99

BuyCheapKeys key€4.60