Games like Four Second Forever
Games like Four Second Forever include Rogue Legacy 2, Exit the Gungeon, A Dance of Fire and Ice, South Park™: The Stick of Truth™, and Streets of Rage 4. We matched them by the tags players give Four Second Forever on Steam (Action, Arcade, Adventure, 2D, and Colorful): closest matches first, and among equally close ones the better-known games.

Rogue Legacy 2
Shared: Arcade · Action · Adventure

Exit the Gungeon
Shared: Arcade · Action · Adventure

A Dance of Fire and Ice
Shared: Arcade · 2D · Colorful

South Park™: The Stick of Truth™
Shared: Adventure · Action · Dark Humor

Streets of Rage 4
Shared: Action · 2D · Arcade

Night in the Woods
Shared: Adventure · Stylized · Dark Humor

Bomb Rush Cyberfunk
Shared: Action · Adventure · Stylized

Nubby's Number Factory
Shared: Arcade · Surreal · Stylized

UFO 50
Shared: Action · Arcade · 2D

SANABI
Shared: Action · Adventure · 2D

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

Cyberhunt
Shared: Action · Adventure · Arcade

Pumpkin Jack
Shared: Action · Adventure · Colorful

ICEY
Shared: Action · Adventure · 2D

Sonic the Hedgehog 4 Episode 1
Shared: Action · 2D · Adventure

Dust: An Elysian Tail
Shared: Action · Adventure · 2D

SUPER CHICKEN JUMPER
Shared: Arcade · 2D · Action

Monster Boy and the Cursed Kingdom
Shared: Action · Adventure · 2D

Chants of Sennaar
Shared: Adventure · Colorful · Indie

Geometry Dash
Shared: 2D · Colorful · Singleplayer

Melatonin
Shared: Colorful · Indie · 2D

Nobody Saves the World
Shared: Action · Adventure · Indie

Sonic Mania
Shared: 2D · Action · Adventure

Vampire Survivors
Shared: 2D · Arcade · Action