Games like Keyboard Souls
Games like Keyboard Souls include Vampire Survivors, Megabonk, Yet Another Zombie Survivors, 20 Minutes Till Dawn, and BALL x PIT. We matched them by the tags players give Keyboard Souls on Steam (Casual, Typing, Arcade, Bullet Hell, and Roguelite): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Roguelite · Casual

Megabonk
Shared: Roguelite · Bullet Hell · Survival

Yet Another Zombie Survivors
Shared: Roguelite · Arcade · Zombies

20 Minutes Till Dawn
Shared: Bullet Hell · Roguelite · Survival

BALL x PIT
Shared: Arcade · Roguelite · Bullet Hell

Brotato
Shared: Bullet Hell · Survival · Roguelite

FatalZone
Shared: Bullet Hell · Roguelite · Survival

Planes, Bullets and Vodka
Shared: Casual · Bullet Hell · Arcade

Boneraiser Minions
Shared: Bullet Hell · Roguelite · Casual

Astro Prospector
Shared: Casual · Roguelite · Bullet Hell

Goobies
Shared: Bullet Hell · Casual · Roguelite

Soulstone Survivors
Shared: Bullet Hell · Roguelite · Score Attack

Glyphica: Typing Survival
Shared: Typing · Bullet Hell · Roguelite

Need for Speed™ Unbound
Shared: Racing · Arcade · Casual

Bit Blaster XL
Shared: Bullet Hell · Arcade · Casual

Nova Drift
Shared: Bullet Hell · Arcade · Roguelite

Drift86
Shared: Casual · Arcade · Racing

Halls of Torment
Shared: Bullet Hell · Roguelite · Arcade

Utopia Must Fall
Shared: Casual · Arcade · Roguelite

Monsters are Coming!
Shared: Roguelite · Bullet Hell · Action

Deep Rock Galactic: Survivor
Shared: Bullet Hell · Roguelite · Arcade

Shower With Your Dad Simulator 2015: Do You Still Shower With Your Dad
Shared: Arcade · Casual · Action

The Typing of The Dead: Overkill
Shared: Typing · Arcade · Zombies

Apocalypse Party
Shared: Casual · Bullet Hell · Roguelite