Games like Aground - Backer Items
Games like Aground - Backer Items include Terraria, Forager, Don't Starve Together, Starbound, and Necesse. We matched them by the tags players give Aground - Backer Items on Steam (Adventure, RPG, Indie, Survival, and Sandbox): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Survival · Sandbox · Adventure

Forager
Shared: Survival · Indie · Pixel Graphics

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

Starbound
Shared: Adventure · Survival · Sandbox

Necesse
Shared: Pixel Graphics · Adventure · Sandbox

Graveyard Keeper
Shared: RPG · Pixel Graphics · Sandbox

Stoneshard
Shared: RPG · Survival · Pixel Graphics

Don't Starve
Shared: Adventure · Survival · Indie

Rust
Shared: Survival · Adventure · Sandbox

Stardew Valley
Shared: RPG · Pixel Graphics · Sandbox

Magicite
Shared: RPG · Indie · Adventure

Noita
Shared: Indie · Pixel Graphics · Sandbox

The Escapists
Shared: Pixel Graphics · Indie · 2D

To the Moon
Shared: Indie · Adventure · Pixel Graphics

Kenshi
Shared: RPG · Survival · Sandbox

Sands of Salzaar
Shared: RPG · Adventure · Indie

ARK: Survival Ascended
Shared: Survival · Adventure · Sandbox

OMORI
Shared: Indie · RPG · Pixel Graphics

Realms of Magic
Shared: RPG · Adventure · Indie

Tales of the Black Forest
Shared: RPG · Adventure · Indie

Palworld
Shared: Survival · Indie · Adventure

Last Oasis
Shared: RPG · Survival · Adventure

Romestead
Shared: Adventure · RPG · 2D

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