Games like Doomsday Jetlag
Games like Doomsday Jetlag include Vampire Survivors, Skul: The Hero Slayer, BALL x PIT, Brotato, and Megabonk. We matched them by the tags players give Doomsday Jetlag on Steam (2D, Action, Stylized, Cold War, and Casual): closest matches first, and among equally close ones the better-known games.

Vampire Survivors
Shared: 2D · Action Roguelike · Singleplayer

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

BALL x PIT
Shared: Action · 2D · Action Roguelike

Brotato
Shared: Singleplayer · Roguelike · Action Roguelike

Megabonk
Shared: Action Roguelike · Action · Roguelike

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

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

Nuclear Throne
Shared: Action · Action Roguelike · Roguelike

Rocket Rats
Shared: 2D · Casual · Action Roguelike

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

Rogue Legacy
Shared: Action · 2D · Roguelike

Dungreed
Shared: Action · 2D · Action Roguelike

Boneraiser Minions
Shared: 2D · Action Roguelike · Bullet Hell

Dead Cells
Shared: 2D · Roguelike · Action Roguelike

Planes, Bullets and Vodka
Shared: Action · Casual · 2D

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

Halls of Torment
Shared: Action Roguelike · Action · Roguelike

Seraph's Last Stand
Shared: 2D · Casual · Action Roguelike

Noobs Want to Live
Shared: Action · Roguelike · Casual

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

Desktop Survivors 98
Shared: Action · 2D · Casual

Star of Providence
Shared: Action · Action Roguelike · 2D

20 Minutes Till Dawn
Shared: Action Roguelike · Bullet Hell · Singleplayer

One Finger Death Punch
Shared: Action · 2D Fighter · 2D