Games like Gravix
Games like Gravix include Defy Gravity Extended, LIMBO, Portal, Human Fall Flat, and Zup!. We matched them by the tags players give Gravix on Steam (Action, Arcade, Puzzle, Puzzle Platformer, and 2D): closest matches first, and among equally close ones the better-known games.

Defy Gravity Extended
Shared: Puzzle Platformer · Puzzle · Action

LIMBO
Shared: Puzzle Platformer · Puzzle · Indie

Portal
Shared: Puzzle · Puzzle Platformer · Action

Human Fall Flat
Shared: Puzzle · Puzzle Platformer · Action

Zup!
Shared: Puzzle · 2D · Indie

Portal 2
Shared: Puzzle · Puzzle Platformer · Singleplayer

UFO 50
Shared: Action · Arcade · 2D

Zup! 2
Shared: Puzzle · 2D · Indie

Out There Somewhere
Shared: Puzzle · Action · 2D

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

Zup! S
Shared: Puzzle · 2D · Indie

Zup! 3
Shared: Puzzle · 2D · Indie

BEEP
Shared: 2D · Action · Puzzle

Peggle Deluxe
Shared: Arcade · Puzzle · 2D

PAC-MAN™ Championship Edition DX+
Shared: Arcade · Action · Retro

Firework
Shared: Puzzle · 2D · Indie

Planet of Lana
Shared: Action · Puzzle Platformer · Puzzle

Zuma Deluxe
Shared: Arcade · Puzzle · 2D

Vampire Survivors
Shared: 2D · Arcade · Action

Teslagrad
Shared: Puzzle · 2D · Action

Zup! 8
Shared: Puzzle · 2D · Indie

Trip to Vinelands
Shared: Action · Arcade · Indie

LUFTRAUSERS
Shared: Arcade · Action · 2D

Kung Fury: Street Rage - Ultimate Edition
Shared: Arcade · Action · Retro