Games like EchoChamber: Not Welcome
Games like EchoChamber: Not Welcome include Vampire Survivors, Pizza Tower, Skul: The Hero Slayer, Katana ZERO, and SANABI. We matched them by the tags players give EchoChamber: Not Welcome on Steam (Action, Indie, PvE, 2D Platformer, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Bullet Hell · Indie · 2D

Pizza Tower
Shared: Indie · 2D Platformer · Action

Skul: The Hero Slayer
Shared: Action · Indie · 2D

Katana ZERO
Shared: Action · Indie · 2D Platformer

SANABI
Shared: Action · 2D Platformer · Indie

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

BlazBlue Entropy Effect
Shared: Action · 2D · Platformer

Rogue Legacy
Shared: Indie · Action · Platformer

Hollow Knight
Shared: Indie · Platformer · 2D

Celeste
Shared: Indie · 2D Platformer · Platformer

Have a Nice Death
Shared: Action · Singleplayer · 2D

Gravity Circuit
Shared: Action · Indie · Platformer

Exit the Gungeon
Shared: Indie · Action · Bullet Hell

20XX
Shared: Action · 2D Platformer · Platformer

Megabonk
Shared: Indie · Action · Bullet Hell

Rogue Legacy 2
Shared: Action · Indie · Platformer

BEEP
Shared: Indie · Action · Platformer

Gunpoint
Shared: Indie · Action · 2D

Downwell
Shared: Indie · Action · 2D Platformer

Spelunky
Shared: Indie · Platformer · 2D

Dust: An Elysian Tail
Shared: Action · Indie · Platformer

Hollow Knight: Silksong
Shared: Indie · Singleplayer · 2D

Geometry Dash
Shared: 2D · Singleplayer · Indie

Dungeon Munchies
Shared: Action · Indie · 2D