Games like Astral Outcast
Games like Astral Outcast include Forager, Terraria, Enshrouded, Starbound, and Valheim. We matched them by the tags players give Astral Outcast on Steam (Survival, Crafting, Farming, Base Building, and Exploration): closest matches first, and among equally close ones the better-known games.

Forager
Shared: Survival · Crafting · Farming Sim

Terraria
Shared: Survival · Crafting · 2D

Enshrouded
Shared: Survival · Base Building · Crafting

Starbound
Shared: Survival · Crafting · Space

Valheim
Shared: Survival · Crafting · Base Building

Core Keeper
Shared: Survival · Exploration · Crafting

DYSMANTLE
Shared: Survival · Crafting · Base Building

Subnautica
Shared: Survival · Crafting · Exploration

Dune: Awakening
Shared: Survival · Exploration · Base Building

Romestead
Shared: Crafting · Survival · 2D

Sons Of The Forest
Shared: Survival · Base Building · Crafting

ASTRONEER
Shared: Survival · Space · Exploration

Green Hell
Shared: Survival · Crafting · Base Building

Grounded
Shared: Survival · Crafting · Base Building

ARK: Survival Evolved
Shared: Survival · Crafting · Base Building

Crashlands
Shared: Survival · Crafting · Exploration

The Planet Crafter
Shared: Survival · Base Building · Crafting

Don't Starve
Shared: Survival · Crafting · Exploration

Abiotic Factor
Shared: Survival · Crafting · Base Building

No Man's Sky
Shared: Survival · Space · Exploration

Grounded 2
Shared: Survival · Base Building · Crafting

ARK: Survival Ascended
Shared: Survival · Crafting · Base Building

The Last Caretaker
Shared: Survival · Crafting · Base Building

The Forest
Shared: Survival · Crafting · Exploration