Games like Rot Gut
Games like Rot Gut include SANABI, Broforce, Anomaly Agent, Katana ZERO, and Celeste. We matched them by the tags players give Rot Gut on Steam (Side Scroller, 2D Platformer, PvE, Platformer, and Shooter): closest matches first, and among equally close ones the better-known games.

SANABI
Shared: 2D Platformer · Story Rich · Platformer

Broforce
Shared: Platformer · 2D · Side Scroller

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Platformer

Katana ZERO
Shared: Platformer · 2D Platformer · Action

Celeste
Shared: 2D Platformer · Platformer · 2D

Huntdown
Shared: Side Scroller · Shooter · 2D

Contra: Operation Galuga
Shared: 2D Platformer · Platformer · Shooter

Rogue Legacy 2
Shared: Platformer · Arcade · Side Scroller

Terminator 2D: NO FATE
Shared: Side Scroller · 2D Platformer · Arcade

Thomas Was Alone
Shared: Side Scroller · Platformer · 2D Platformer

Skul: The Hero Slayer
Shared: Platformer · 2D · Side Scroller

Alex Jones: NWO Wars
Shared: 2D Platformer · Side Scroller · Shooter

Momodora: Reverie Under The Moonlight
Shared: 2D Platformer · Side Scroller · 2D

Laika: Aged Through Blood
Shared: 2D Platformer · Arcade · Platformer

Nitro Express
Shared: Side Scroller · 2D Platformer · Shooter

BlazBlue Entropy Effect
Shared: Platformer · 2D · Action-Adventure

Shovel Knight: Treasure Trove
Shared: Platformer · Side Scroller · 2D

Hollow Knight
Shared: Platformer · 2D · Indie

Teenage Mutant Ninja Turtles: Shredder's Revenge
Shared: Side Scroller · Action-Adventure · Arcade

Sonic Superstars
Shared: 2D Platformer · Platformer · Action-Adventure

Super Time Force Ultra
Shared: Side Scroller · 2D Platformer · PvE

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

Owlboy
Shared: Platformer · 2D · Adventure

Downwell
Shared: Platformer · 2D Platformer · Arcade