Games like Phantom
Games like Phantom include Terraria, Last Oasis, Don't Starve Together, Rust, and The Scroll of Taiwu : Beyond The Dome. We matched them by the tags players give Phantom on Steam (RPG, Early Access, Indie, Adventure, and Sandbox): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Sandbox · Survival · Adventure

Last Oasis
Shared: RPG · Survival · Adventure

Don't Starve Together
Shared: Survival · Adventure · Sandbox

Rust
Shared: Survival · Sandbox · Adventure

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Sandbox · Indie

Don't Starve
Shared: Survival · Adventure · Indie

Sands of Salzaar
Shared: RPG · Indie · Adventure

Dark and Light
Shared: RPG · Survival · Sandbox

Palworld
Shared: Survival · Indie · Adventure

Kenshi
Shared: RPG · Sandbox · Survival

Craftopia
Shared: RPG · Survival · Sandbox

Portal Knights
Shared: RPG · Adventure · Sandbox

Project Zomboid
Shared: Survival · Sandbox · Indie

Starbound
Shared: Sandbox · Adventure · Survival

Necesse
Shared: Sandbox · Survival · Adventure

Beasts of Bermuda
Shared: Adventure · Survival · Early Access

Project: Gorgon
Shared: RPG · Indie · Early Access

Enshrouded
Shared: Survival · RPG · Adventure

Feed and Grow: Fish
Shared: Early Access · Survival · Indie

Obenseuer
Shared: Indie · RPG · Early Access

KINGDOMS
Shared: RPG · Survival · Early Access

Forager
Shared: Indie · Survival · Sandbox

ARK: Survival Ascended
Shared: Survival · Adventure · Sandbox

7 Days to Die
Shared: Survival · RPG · Indie