Games like Thunderday
Games like Thunderday include Vampire Survivors, Enter the Gungeon, BlazBlue Entropy Effect, Rogue: Genesia, and Windowkill. We matched them by the tags players give Thunderday on Steam (Action Roguelike, Bullet Hell, Twin Stick Shooter, PvE, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

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

Enter the Gungeon
Shared: Action Roguelike · Bullet Hell · Twin Stick Shooter

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

Rogue: Genesia
Shared: Bullet Hell · Action Roguelike · Twin Stick Shooter

Windowkill
Shared: Action Roguelike · Bullet Hell · Action

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

Relic Hunters Zero: Remix
Shared: Twin Stick Shooter · Action Roguelike · Action

Deep Rock Galactic: Survivor
Shared: Action Roguelike · Bullet Hell · PvE

Voidigo
Shared: Action Roguelike · Twin Stick Shooter · Bullet Hell

Revita
Shared: Action Roguelike · Twin Stick Shooter · PvE

Rabbit and Steel
Shared: Bullet Hell · Action Roguelike · 2D

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

Death Must Die
Shared: Action Roguelike · Bullet Hell · 2D

Warhammer 40,000: Space Marine 2
Shared: PvE · Action · Action-Adventure

Risk of Rain Returns
Shared: Action Roguelike · PvE · 2D

Megabonk
Shared: Action Roguelike · Bullet Hell · Action

Return to abyss 重返深渊
Shared: Action Roguelike · Bullet Hell · Action-Adventure

Nuclear Throne
Shared: Action Roguelike · Bullet Hell · Action

Atomicrops
Shared: Bullet Hell · Action Roguelike · Action

Bloody Hell
Shared: Bullet Hell · Twin Stick Shooter · Indie

暖雪 Warm Snow
Shared: Action Roguelike · Action-Adventure · 2D

Time Wasters
Shared: Action Roguelike · Bullet Hell · Twin Stick Shooter

Dead Estate
Shared: Action Roguelike · Twin Stick Shooter · Bullet Hell

Beat Hazard
Shared: Twin Stick Shooter · Bullet Hell · 2D