Games like Mouse Killer
Games like Mouse Killer include Vampire Survivors, Skul: The Hero Slayer, Gunpoint, DELTARUNE, and Hammerfight. We matched them by the tags players give Mouse Killer on Steam (Action, Bullet Hell, 2D, Comedy, and Singleplayer): closest matches first, and among equally close ones the better-known games.
Vampire Survivors
Shared: Bullet Hell · 2D · Singleplayer
Skul: The Hero Slayer
Shared: Action · 2D · Indie
Gunpoint
Shared: 2D · Action · Indie
DELTARUNE
Shared: Bullet Hell · Singleplayer · 2D
Hammerfight
Shared: Action · 2D · Mouse Only
LUFTRAUSERS
Shared: Bullet Hell · Action · 2D
Just Shapes & Beats
Shared: Bullet Hell · 2D · Action
Bloody Hell
Shared: Bullet Hell · Singleplayer · Indie
Dungeon Munchies
Shared: Action · Indie · 2D
South Park™: The Stick of Truth™
Shared: Comedy · Action · Singleplayer
Windowkill
Shared: Action · Bullet Hell · 2D
Undertale
Shared: Singleplayer · 2D · Comedy
Exit the Gungeon
Shared: Action · Bullet Hell · 2D
Halo Infinite
Shared: Action · Free to Play · Singleplayer
Rhythm Doctor
Shared: Action · Singleplayer · 2D
Enter the Gungeon
Shared: Bullet Hell · Indie · 2D
My Friend Pedro
Shared: Action · Indie · Singleplayer
Pizza Tower
Shared: Indie · Action · Singleplayer
Broforce
Shared: Action · 2D · Indie
Touhou Koumakyou: New Classic - the Embodiment of Scarlet Devil
Shared: Bullet Hell · Action · 2D
Megabonk
Shared: Bullet Hell · Action · Indie
UnEpic
Shared: Action · Comedy · 2D
One Finger Death Punch
Shared: Action · Singleplayer · Indie
Touhou Fuujinroku ~ Mountain of Faith.
Shared: Action · Bullet Hell · Indie