Games like Octo Gravity
Games like Octo Gravity include Timberman, Move or Die, Super Hexagon, The Binding of Isaac: Rebirth, and Streets of Rage 4. We matched them by the tags players give Octo Gravity on Steam (Indie, Casual, Local Multiplayer, Multiplayer, and 2D): closest matches first, and among equally close ones the better-known games.

Timberman
Shared: Casual · Indie · Multiplayer

Move or Die
Shared: Multiplayer · Local Multiplayer · Indie

Super Hexagon
Shared: Indie · Great Soundtrack · Arcade

The Binding of Isaac: Rebirth
Shared: Indie · Replay Value · Great Soundtrack

Streets of Rage 4
Shared: Indie · 2D · Local Multiplayer

SpeedRunners
Shared: Indie · Multiplayer · Local Multiplayer

Cuphead
Shared: Indie · Great Soundtrack · 2D

Stick Fight: The Game
Shared: Multiplayer · Local Multiplayer · 2D

Geometry Dash
Shared: 2D · Great Soundtrack · Difficult

Just Shapes & Beats
Shared: Great Soundtrack · Indie · Multiplayer

A Dance of Fire and Ice
Shared: Indie · 2D · Difficult

Hollow Knight: Silksong
Shared: Indie · Great Soundtrack · 2D

Rivals of Aether
Shared: Indie · Multiplayer · Local Multiplayer

Overcooked
Shared: Indie · Multiplayer · Local Multiplayer

Plague Inc: Evolved
Shared: Indie · Multiplayer · Casual

Duck Game
Shared: Multiplayer · Local Multiplayer · Indie

Golf With Your Friends
Shared: Casual · Multiplayer · Indie

Hollow Knight
Shared: Indie · 2D · Great Soundtrack

Lethal League
Shared: Indie · Local Multiplayer · Multiplayer

Game Dev Tycoon
Shared: Indie · Casual · 2D

Overcooked! 2
Shared: Multiplayer · Casual · Indie

Peggle Deluxe
Shared: Casual · Arcade · 2D

UFO 50
Shared: Indie · 2D · Arcade

PARTICLE MACE
Shared: Indie · 2D · Multiplayer