Games like Flat Trip
Games like Flat Trip include Hollow Knight, Hollow Knight: Silksong, GRIS, Cuphead, and Geometry Dash. We matched them by the tags players give Flat Trip on Steam (Indie, Hand-drawn, Singleplayer, Short, and Platformer): closest matches first, and among equally close ones the better-known games.

Hollow Knight
Shared: Great Soundtrack · Platformer · Indie

Hollow Knight: Silksong
Shared: Indie · Great Soundtrack · Singleplayer

GRIS
Shared: Indie · Great Soundtrack · Hand-drawn

Cuphead
Shared: Great Soundtrack · Platformer · Indie

Geometry Dash
Shared: Great Soundtrack · 2D · Singleplayer

Celeste
Shared: Indie · Great Soundtrack · Platformer

Gorogoa
Shared: Hand-drawn · Indie · Singleplayer

Pizza Tower
Shared: Great Soundtrack · Indie · Platformer

To the Moon
Shared: Indie · Great Soundtrack · Singleplayer

Super Meat Boy
Shared: Indie · Platformer · Singleplayer

Shovel Knight: Treasure Trove
Shared: Indie · Great Soundtrack · Platformer

LIMBO
Shared: Indie · Platformer · Singleplayer

A Bird Story
Shared: Indie · Great Soundtrack · Short

Neon Beats
Shared: Indie · Great Soundtrack · Singleplayer

Out There Somewhere
Shared: Indie · Platformer · Great Soundtrack

Undertale
Shared: Great Soundtrack · Indie · Singleplayer

Ori and the Will of the Wisps
Shared: Great Soundtrack · Singleplayer · Platformer

Katana ZERO
Shared: Great Soundtrack · Indie · Platformer

The Binding of Isaac: Rebirth
Shared: Indie · Great Soundtrack · Singleplayer

FEZ
Shared: Indie · Platformer · Great Soundtrack

Gunpoint
Shared: Indie · Singleplayer · 2D

Dust: An Elysian Tail
Shared: Indie · Platformer · Singleplayer

OMORI
Shared: Indie · Great Soundtrack · Hand-drawn

VVVVVV
Shared: Indie · Great Soundtrack · Platformer