Games like Don't Forget to Smile
Games like Don't Forget to Smile include Enter the Gungeon, BALL x PIT, Vampire Survivors, Nuclear Throne, and Nova Drift. We matched them by the tags players give Don't Forget to Smile on Steam (Action, Action Roguelike, Shooter, Roguelike, and Bullet Hell): closest matches first, and among equally close ones the better-known games.

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Roguelike

BALL x PIT
Shared: Action · Action Roguelike · Roguelike

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · 2D

Nuclear Throne
Shared: Action Roguelike · Roguelike · Action

Nova Drift
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Star of Providence
Shared: Action Roguelike · Bullet Hell · Action

Risk of Rain 2
Shared: Action Roguelike · Action · Roguelike

Halls of Torment
Shared: Action Roguelike · Bullet Hell · Action

Dead Estate
Shared: Action Roguelike · Roguelike · Bullet Hell

The Binding of Isaac
Shared: Action Roguelike · Roguelike · Action

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · 2D

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Roguelike

Megabonk
Shared: Action Roguelike · Roguelike · Action

Returnal™
Shared: Action · Bullet Hell · Roguelike

I Am Legion: Stand Survivors
Shared: Action Roguelike · Bullet Hell · Shoot 'Em Up

Dead Cells
Shared: Action Roguelike · Roguelike · 2D

Death Must Die
Shared: Action Roguelike · Bullet Hell · Action

Bit Blaster XL
Shared: Bullet Hell · Shooter · Shoot 'Em Up

Slime 3K: Rise Against Despot
Shared: Action Roguelike · Bullet Hell · Roguelike

Rabbit and Steel
Shared: Action Roguelike · Bullet Hell · Roguelike

Roboquest
Shared: Action Roguelike · Shooter · Action

Hades II
Shared: Action · Roguelike · Action Roguelike

Pathogenic
Shared: Roguelike · Bullet Hell · Action Roguelike

Angel at Dusk
Shared: Action · Shooter · Bullet Hell