Games like PixelJunk™ Nom Nom Galaxy
Games like PixelJunk™ Nom Nom Galaxy include Terraria, Broforce, Factorio, The Escapists 2, and Overcooked! 2. We matched them by the tags players give PixelJunk™ Nom Nom Galaxy on Steam (Indie, Casual, Strategy, Action, and Local Co-Op): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Sandbox · 2D · Indie

Broforce
Shared: Action · Indie · Local Co-Op

Factorio
Shared: Strategy · Base Building · Sandbox

The Escapists 2
Shared: Strategy · Local Co-Op · Indie

Overcooked! 2
Shared: Local Co-Op · Casual · Indie

Bloons TD 6
Shared: Strategy · Casual · Co-op

PICO PARK
Shared: Casual · Local Co-Op · Co-op

Garry's Mod
Shared: Sandbox · Casual · Building

Awesomenauts
Shared: Indie · Action · 2D

ShellShock Live
Shared: Strategy · Action · Casual

Forts
Shared: Strategy · Base Building · Sandbox

Move or Die
Shared: Action · Indie · 2D

Bloons TD 5
Shared: Strategy · Casual · Action

Once Human
Shared: Action · Co-op · Multiplayer

Palworld
Shared: Indie · Multiplayer · Online Co-Op

Castle Crashers®
Shared: 2D · Co-op · Local Co-Op

The Riftbreaker
Shared: Base Building · Online Co-Op · Sandbox

Stick Fight: The Game
Shared: Action · Casual · Multiplayer

Gang Beasts
Shared: Action · Casual · Indie

Cuphead
Shared: Local Co-Op · Indie · Co-op

Human Fall Flat
Shared: Co-op · Sandbox · Action

Raft
Shared: Co-op · Base Building · Multiplayer

King Arthur's Gold
Shared: Indie · Action · 2D

Monaco: What's Yours Is Mine
Shared: Indie · Strategy · Local Co-Op