Games like My Last 20 - Founder's Pack
Games like My Last 20 - Founder's Pack include Vampire Survivors, Megabonk, Brotato, Planes, Bullets and Vodka, and Among Us. We matched them by the tags players give My Last 20 - Founder's Pack on Steam (Casual, Arcade, Survival, Space, and Roguelike): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Casual · Pixel Graphics

Megabonk
Shared: Roguelike · Survival · Bullet Hell

Brotato
Shared: Roguelike · Bullet Hell · Survival

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

Among Us
Shared: Space · Survival · Casual

FTL: Faster Than Light
Shared: Space · Roguelike · Singleplayer

Bit Blaster XL
Shared: Arcade · Bullet Hell · Casual

Boneraiser Minions
Shared: Bullet Hell · Casual · Pixel Graphics

Rocket Rats
Shared: Casual · Bullet Hell · Pixel Graphics

Nubby's Number Factory
Shared: Arcade · Roguelike · Singleplayer

To The Core
Shared: Casual · Arcade · 2D

Seraph's Last Stand
Shared: Casual · Bullet Hell · Roguelike

Starbound
Shared: Survival · Space · Pixel Graphics

Razortron 2000
Shared: Casual · Arcade · Retro

Cyberhunt
Shared: Casual · Arcade · Space

Balatro
Shared: Roguelike · Casual · Singleplayer

BALL x PIT
Shared: Arcade · Roguelike · Bullet Hell

Timberman
Shared: Casual · Arcade · Pixel Graphics

Nova Drift
Shared: Arcade · Bullet Hell · Roguelike

Enter the Gungeon
Shared: Bullet Hell · Roguelike · Pixel Graphics

Halls of Torment
Shared: Bullet Hell · Roguelike · Arcade

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

Super Bit Blaster XL
Shared: Arcade · Bullet Hell · Casual

A Dance of Fire and Ice
Shared: Arcade · Casual · Singleplayer