Games like CubeGun
Games like CubeGun include Rust, Once Human, Terraria, skate., and Scrap Mechanic. We matched them by the tags players give CubeGun on Steam (Free to Play, Sandbox, Multiplayer, Indie, and Action): closest matches first, and among equally close ones the better-known games.

Rust
Shared: Multiplayer · Crafting · Sandbox

Once Human
Shared: Free to Play · Multiplayer · Action

Terraria
Shared: Sandbox · Multiplayer · Crafting

skate.
Shared: Free to Play · Multiplayer · Action

Scrap Mechanic
Shared: Sandbox · Multiplayer · Building

ARK: Survival Evolved
Shared: Multiplayer · Crafting · Building

TerraTech
Shared: Sandbox · Multiplayer · Building

Trove
Shared: Free to Play · Sandbox · Multiplayer

Garry's Mod
Shared: Sandbox · Multiplayer · Building

ARK: Survival Ascended
Shared: Multiplayer · Sandbox · Crafting

Medieval Dynasty
Shared: Multiplayer · Crafting · Building

Raft
Shared: Multiplayer · Crafting · Sandbox

Albion Online
Shared: Free to Play · Sandbox · Multiplayer

Apex Legends™
Shared: Free to Play · Multiplayer · Action

Palia
Shared: Free to Play · Multiplayer · Crafting

SMITE®
Shared: Free to Play · Multiplayer · Action

Project Zomboid
Shared: Multiplayer · Sandbox · Indie

Craftopia
Shared: Multiplayer · Sandbox · Crafting

Stardew Valley
Shared: Multiplayer · Sandbox · Indie

Palworld
Shared: Multiplayer · Indie · Crafting

King Arthur's Gold
Shared: Multiplayer · Action · Indie

Marvel Rivals
Shared: Free to Play · Multiplayer · Action

Last Oasis
Shared: Action · Indie · Multiplayer

Brick Rigs
Shared: Sandbox · Multiplayer · Building