Games like Alien Siege: Earth
Games like Alien Siege: Earth include CS2D, Vampire Survivors, Cyberhunt, Halo: Spartan Assault, and Chicken Invaders Universe. We matched them by the tags players give Alien Siege: Earth on Steam (Action, Top-Down Shooter, 2D, Casual, and Top-Down): closest matches first, and among equally close ones the better-known games.
CS2D
Shared: 2D · Action · Top-Down Shooter
Vampire Survivors
Shared: 2D · Casual · Action
Cyberhunt
Shared: Action · Casual · 2D
Halo: Spartan Assault
Shared: Action · Top-Down Shooter · Top-Down
Chicken Invaders Universe
Shared: Top-Down Shooter · Action · Casual
Planes, Bullets and Vodka
Shared: Action · Casual · 2D
STAR WARS™ Battlefront™ II
Shared: Action · Space · Singleplayer
Hotline Miami
Shared: Action · Top-Down · Indie
BALL x PIT
Shared: Action · Top-Down Shooter · Arcade
Bit Blaster XL
Shared: 2D · Action · Controller
Hotline Miami 2: Wrong Number
Shared: Action · Top-Down · Top-Down Shooter
Timberman
Shared: Casual · Action · 2D
Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: 2D · Casual · Action
12 is Better Than 6
Shared: Action · Top-Down Shooter · 2D
Defy Gravity Extended
Shared: 2D · Action · Space
Broforce
Shared: Action · 2D · Pixel Graphics
Heat Signature
Shared: Action · Top-Down · Space
Dome Keeper
Shared: Action · Singleplayer · Sci-fi
Rocket Rats
Shared: Casual · 2D · Action
Space Pirates and Zombies
Shared: Action · Space · Top-Down
Alien Shooter
Shared: Action · Top-Down · Top-Down Shooter
SAS: Zombie Assault 4
Shared: Top-Down Shooter · Action · 2D
Reassembly
Shared: Action · 2D · Space
Orbt XL
Shared: 2D · Action · Controller