Games like Colony Siege

20 games, the closest and most played first.

1. Sanctum 2
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid…
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game.
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game.
Tower DefenseSci FiFPS
Played by
2. Warhammer 40,000: Dawn of War - Definitive Edition
All of Warhammer 40,000: Dawn of War in one definitive package.
All of Warhammer 40,000: Dawn of War in one definitive package.
All of Warhammer 40,000: Dawn of War in one definitive package.
Sci FiRTSBase Building
Played by
3. DG2: Defense Grid 2
Great strategy is timeless.
Great strategy is timeless.
Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises.
TacticalTower DefenseSci Fi
Played by
4. X-Morph: Defense
Unique fusion of a top-down shooter and tower defense strategy.
Unique fusion of a top-down shooter and tower defense strategy. You are the invader!
Unique fusion of a top-down shooter and tower defense strategy. You are the invader! Use destructive weapons or lead your enemies into a maze of towers.
Tower DefenseSci FiLocal Co-op
5. Sanctum
You think Tower Defense games are all about building? You thought wrong.
You think Tower Defense games are all about building? You thought wrong.
You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray!
Tower DefenseSci FiFPS
Played by
6. Orcs Must Die! 2
You’ve tossed, burned and sliced them by the thousands – now orcs must…
You’ve tossed, burned and sliced them by the thousands – now orcs must die more than ever…
You’ve tossed, burned and sliced them by the thousands – now orcs must die more than ever before!
Tower DefenseThird PersonStrategy
Played by
7. Dungeon of the ENDLESS™
Dungeon of the ENDLESS™ is a Rogue-Like Dungeon-Defense game, in which…
Dungeon of the ENDLESS™ is a Rogue-Like Dungeon-Defense game, in which the player and their…
A few hundred condemned criminals were being shipped to the Auriga system on board the prison hulk “Success”.
Tower DefenseSci FiRoguelike
Played by
8. Dungeon Defenders: Awakened
That’s right; it’s back!
Dungeon Defenders: Awakened is co-op Tower Defense combined with epic Action RPG combat.
Dungeon Defenders: Awakened is co-op Tower Defense combined with epic Action RPG combat.
Tower DefenseAction RPGStrategy
Played by
9. Planetary Annihilation: TITANS
Wage war across entire solar systems with massive armies at your…
Wage war across entire solar systems with massive armies at your command.
Wage war across entire solar systems with massive armies at your command.
Real Time TacticsSci FiRTS
Played by
10. Halo Wars: Definitive Edition
Halo Wars: Definitive Edition is an enhanced version of the real-time…
Halo Wars: Definitive Edition is an enhanced version of the real-time strategy classic…
Halo Wars: Definitive Edition is an enhanced version of the real-time strategy classic, Halo Wars, updated to run natively on PC.
WarSci FiRTS
Played by
11. Battlefleet Gothic: Armada 2
Battlefleet Gothic: Armada 2 is the new real-time strategy game adapted…
Battlefleet Gothic: Armada 2 is the new real-time strategy game adapted from Games…
Battlefleet Gothic: Armada 2 is the new real-time strategy game adapted from Games Workshop’s famous tabletop game that portrays the epic space battles of the Warhammer 40,000…
Real Time TacticsSpaceSci Fi
Played by
12. Mindustry
An open-ended factory management game with RTS and tower defense…
An open-ended factory management game with RTS and tower defense elements.
An open-ended factory management game with RTS and tower defense elements.
Resource ManagementAutomationTower Defense
Played by
13. The Red Solstice
2280 A.D.
2280 A.D.
2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders.
AliensTacticalSci Fi
Played by
14. AI War: Fleet Command
"You are outgunned. You are massively outnumbered. You must win."
"You are outgunned. You are massively outnumbered. You must win." These are your orders.
"You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost.
4XSpaceSci Fi
Played by
15. Starship Troopers: Extermination
Starship Troopers: Extermination is an up to 16-player co-op FPS that…
Starship Troopers: Extermination is an up to 16-player co-op FPS that puts you on the…
Starship Troopers: Extermination is an up to 16-player co-op FPS that puts you on the far-off frontlines of an all-out battle against the Bugs!
Sci FiFPSFirst Person
Played by
16. Bloons TD 5
Five-star tower defense with unrivaled depth and replayability.
Five-star tower defense with unrivaled depth and replayability.
Five-star tower defense with unrivaled depth and replayability. The Bloons are back in full HD glory and this time they mean business!
Tower DefenseFamily FriendlyStrategy
Played by
17. Dungeon Defenders
Create a hero from one of four classes to save Etheria in this 4-player…
Create a hero from one of four classes to save Etheria in this 4-player coop Tower Defense…
Create a hero from one of four classes to save Etheria in this 4-player coop Tower Defense Action-RPG. Includes Steam exclusive Portal gun & TF2 familiars!
Tower DefenseAction RPGSurvival
Played by
18. Battlefleet Gothic: Armada (Classic)
Battlefleet Gothic: Armada is the RTS videogame adaptation of Games…
Battlefleet Gothic: Armada is the RTS videogame adaptation of Games Workshop’s classic…
Battlefleet Gothic: Armada is the RTS videogame adaptation of Games Workshop’s classic tabletop game, pitting the Chaos, Imperium, Eldar, and Orks against each other in visceral…
TacticalSpaceSci Fi
19. Orcs Must Die! 3
Orcs Must Die!
Orcs Must Die! 3 ushers orc-slaying mayhem to a previously unimaginable scale.
Slice, burn, toss, zap, grind and gib massive hordes of repugnant orcs in this long-awaited successor to the award-winning Orcs Must Die! series.
Tower DefenseThird Person ShooterPvE
Played by
20. Age of Darkness: Final Stand
Age of Darkness: Final Stand is a dark fantasy survival RTS where you…
Build, Gather and Fight in a Desperate Last Stand Against an Onslaught of Never Ending Evil!
Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares.
Action RTSDark FantasyTower Defense
Played by

1. Sanctum 2

2. Warhammer 40,000: Dawn of War - Definitive Edition

3. DG2: Defense Grid 2

4. X-Morph: Defense

5. Sanctum

6. Orcs Must Die! 2

7. Dungeon of the ENDLESS™

8. Dungeon Defenders: Awakened

9. Planetary Annihilation: TITANS

10. Halo Wars: Definitive Edition

11. Battlefleet Gothic: Armada 2

12. Mindustry

13. The Red Solstice

14. AI War: Fleet Command

15. Starship Troopers: Extermination

16. Bloons TD 5

17. Dungeon Defenders

18. Battlefleet Gothic: Armada (Classic)

19. Orcs Must Die! 3

20. Age of Darkness: Final Stand