Games like Aground
Games like Aground include Terraria, Valheim, 7 Days to Die, Dune: Awakening, and Core Keeper. We matched them by the tags players give Aground on Steam (Exploration, Open World, Survival, Base Building, and Story Rich): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Survival · Open World Survival Craft · Exploration

Valheim
Shared: Survival · Open World · Exploration

7 Days to Die
Shared: Survival · Open World · Base Building

Dune: Awakening
Shared: Exploration · Survival · Base Building

Core Keeper
Shared: Open World · Exploration · Survival

ARK: Survival Evolved
Shared: Survival · Open World · Open World Survival Craft

Enshrouded
Shared: Open World · Survival · Base Building

Once Human
Shared: Open World · Survival · Exploration

Palworld
Shared: Open World · Survival · Open World Survival Craft

The Forest
Shared: Survival · Open World · Open World Survival Craft

ASTRONEER
Shared: Open World · Exploration · Survival

Rust
Shared: Survival · Open World · Building

Subnautica
Shared: Survival · Open World · Exploration

The Planet Crafter
Shared: Base Building · Survival · Open World

Sons Of The Forest
Shared: Open World · Survival · Base Building

Starbound
Shared: Survival · Open World Survival Craft · Open World

Satisfactory
Shared: Open World · Base Building · Exploration

ICARUS
Shared: Survival · Base Building · Open World

Necesse
Shared: Open World · Survival · Open World Survival Craft

Raft
Shared: Survival · Open World · Base Building

Subnautica: Below Zero
Shared: Survival · Open World · Exploration

Crashlands
Shared: Open World · Exploration · Survival

Project Zomboid
Shared: Survival · Open World · Open World Survival Craft

Forager
Shared: Survival · Open World Survival Craft · Base Building