Games like F.I.S.H.
Games like F.I.S.H. include Rhythm Doctor, Undertale, Pizza Tower, Hotline Miami, and DELTARUNE. We matched them by the tags players give F.I.S.H. on Steam (Rhythm, Pixel Graphics, Action, 2D, and Comedy): closest matches first, and among equally close ones the better-known games.

Rhythm Doctor
Shared: Rhythm · Pixel Graphics · Action

Undertale
Shared: Pixel Graphics · Funny · 2D

Pizza Tower
Shared: Pixel Graphics · Funny · Indie

Hotline Miami
Shared: Action · Pixel Graphics · Indie

DELTARUNE
Shared: Pixel Graphics · Funny · 2D

Duck Game
Shared: Pixel Graphics · Action · Funny

Broforce
Shared: Pixel Graphics · Action · 2D

Shovel Knight: Treasure Trove
Shared: Pixel Graphics · 2D · Action

Geometry Dash
Shared: Rhythm · 2D · Singleplayer

Gunpoint
Shared: Pixel Graphics · 2D · Indie

Hotline Miami 2: Wrong Number
Shared: Pixel Graphics · Action · Indie

SANABI
Shared: Pixel Graphics · Action · 2D

Dungeon Munchies
Shared: Pixel Graphics · Action · Indie

Skul: The Hero Slayer
Shared: Action · Pixel Graphics · Indie

The Messenger
Shared: Pixel Graphics · 2D · Action

Katana ZERO
Shared: Pixel Graphics · Action · 2D

A Dance of Fire and Ice
Shared: Rhythm · 2D · Indie

Retro City Rampage™ DX
Shared: Action · Pixel Graphics · Indie

There Is No Game: Wrong Dimension
Shared: Pixel Graphics · Indie · Funny

Vampire Survivors
Shared: Pixel Graphics · 2D · Indie

UFO 50
Shared: Pixel Graphics · Action · 2D

NOT A HERO
Shared: Pixel Graphics · Action · Comedy

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

UnMetal
Shared: Pixel Graphics · 2D · Action