Games like Bot Gaiden
Games like Bot Gaiden include Anomaly Agent, Geometry Dash, Pizza Tower, Cuphead, and Blasphemous 2. We matched them by the tags players give Bot Gaiden on Steam (Side Scroller, Hack and Slash, 2D Platformer, Difficult, and Platformer): closest matches first, and among equally close ones the better-known games.

Anomaly Agent
Shared: Side Scroller · 2D Platformer · Hack and Slash

Geometry Dash
Shared: Difficult · 2D · Platformer

Pizza Tower
Shared: 2D Platformer · Platformer · Funny

Cuphead
Shared: Difficult · Platformer · 2D

Blasphemous 2
Shared: Difficult · Side Scroller · 2D Platformer

Katana ZERO
Shared: Platformer · 2D Platformer · Hack and Slash

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

SANABI
Shared: 2D Platformer · 2D · Action

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

Afterimage
Shared: 2D Platformer · Side Scroller · Hack and Slash

Celeste
Shared: Difficult · 2D Platformer · Platformer

Hollow Knight
Shared: Platformer · Difficult · 2D

NINJA GAIDEN: Ragebound
Shared: 2D Platformer · Side Scroller · Platformer

Spelunky 2
Shared: 2D Platformer · Platformer · Difficult

Super Meat Boy Forever
Shared: Difficult · Platformer · Side Scroller

SHINOBI: Art of Vengeance
Shared: 2D Platformer · Platformer · Hack and Slash

The Messenger
Shared: Platformer · 2D · 2D Platformer

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

Touhou Luna Nights
Shared: Side Scroller · Difficult · Platformer

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

Nine Sols
Shared: Difficult · Platformer · 2D

Have a Nice Death
Shared: Hack and Slash · 2D · 2D Platformer

ICEY
Shared: Hack and Slash · Side Scroller · 2D

Hollow Knight: Silksong
Shared: Difficult · 2D · Platformer