Games like Batiman
Games like Batiman include Vampire Survivors, Timberman, UFO 50, Downwell, and Razortron 2000. We matched them by the tags players give Batiman on Steam (Casual, Arcade, 2D Platformer, 2D, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Pixel Graphics · 2D · Casual

Timberman
Shared: Casual · Pixel Graphics · 2D

UFO 50
Shared: Pixel Graphics · Arcade · 2D

Downwell
Shared: Pixel Graphics · Arcade · 2D Platformer

Razortron 2000
Shared: Casual · Arcade · Retro

To The Core
Shared: Casual · Arcade · 2D

SANABI
Shared: Pixel Graphics · 2D Platformer · 2D

Super Meat Boy
Shared: 2D Platformer · Pixel Graphics · 2D

Sonic Origins
Shared: 2D Platformer · Casual · Pixel Graphics

Celeste
Shared: Pixel Graphics · 2D Platformer · Indie

Exit the Gungeon
Shared: Arcade · Pixel Graphics · 2D

Planes, Bullets and Vodka
Shared: Casual · Arcade · Retro

Pizza Tower
Shared: 2D Platformer · Pixel Graphics · Indie

Ninja Kiwi Archive
Shared: Casual · Arcade · 2D Platformer

Cyberhunt
Shared: Casual · Arcade · Indie

Broforce
Shared: Pixel Graphics · 2D · Indie

MARVEL Cosmic Invasion
Shared: Arcade · Pixel Graphics · Superhero

Peggle Deluxe
Shared: Casual · Arcade · 2D

Papers, Please
Shared: Pixel Graphics · Indie · Retro

Stardew Valley
Shared: Pixel Graphics · Multiplayer · Casual

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Pixel Graphics · 2D · Arcade

Door Kickers: Action Squad
Shared: 2D Platformer · Pixel Graphics · Retro

The Messenger
Shared: Retro · Pixel Graphics · 2D

pureya
Shared: Arcade · Casual · 2D