Games like Dream World Adventure
Games like Dream World Adventure include Vampire Survivors, Megabonk, Seraph's Last Stand, Brotato, and Enter the Gungeon. We matched them by the tags players give Dream World Adventure on Steam (Casual, Action, Action Roguelike, Bullet Hell, and Cute): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: Action Roguelike · Bullet Hell · Casual

Megabonk
Shared: Action Roguelike · Roguelike · Bullet Hell

Seraph's Last Stand
Shared: Casual · Action Roguelike · Bullet Hell

Brotato
Shared: Action Roguelike · Bullet Hell · Roguelike

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

Rocket Rats
Shared: Action Roguelike · Casual · Bullet Hell

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

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

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

Noobs Want to Live
Shared: Bullet Hell · Action · Roguelike

BALL x PIT
Shared: Action · Bullet Hell · Action Roguelike

Magicraft
Shared: Action Roguelike · Bullet Hell · Roguelike

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

Infinite Tao
Shared: Casual · Action Roguelike · Action

Desktop Survivors 98
Shared: Action Roguelike · Action · Casual

Boneraiser Minions
Shared: Action Roguelike · Bullet Hell · Casual

Hades
Shared: Action Roguelike · Action · Roguelike

Jianghu Survivor
Shared: Casual · Action · Action Roguelike

Cult of the Lamb
Shared: Action Roguelike · Cute · Singleplayer

Tower of Babel: Survivors of Chaos
Shared: Action Roguelike · Bullet Hell · Action

Dead Cells
Shared: Action Roguelike · Roguelike · 2D

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

Returnal™
Shared: Action · Bullet Hell · Roguelike

Nuclear Throne
Shared: Action Roguelike · Roguelike · Action