Games like Gathera
Games like Gathera include Terraria, Stardew Valley, Forager, Rust, and Starbound. We matched them by the tags players give Gathera on Steam (Adventure, Pixel Graphics, Survival, Crafting, and Indie): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Survival · Pixel Graphics · Sandbox

Stardew Valley
Shared: Pixel Graphics · Farming Sim · Crafting

Forager
Shared: Pixel Graphics · Survival · Crafting

Rust
Shared: Survival · Crafting · Adventure

Starbound
Shared: Survival · Adventure · Sandbox

The Forest
Shared: Survival · Adventure · Crafting

Core Keeper
Shared: Survival · Pixel Graphics · Open World

ARK: Survival Evolved
Shared: Survival · Adventure · Crafting

Necesse
Shared: Pixel Graphics · Survival · Adventure

Don't Starve
Shared: Survival · Adventure · Crafting

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

Palworld
Shared: Survival · Open World · Crafting

Raft
Shared: Survival · Crafting · Adventure

ARK: Survival Ascended
Shared: Survival · Adventure · Crafting

Valheim
Shared: Survival · Crafting · Open World

Scrap Mechanic
Shared: Survival · Sandbox · Building

Sons Of The Forest
Shared: Survival · Open World · Crafting

Conan Exiles Enhanced
Shared: Survival · Crafting · Open World

Project Zomboid
Shared: Survival · Open World · Sandbox

The Long Dark
Shared: Survival · Adventure · Open World

My Time at Portia
Shared: Crafting · Adventure · Open World

Once Human
Shared: Survival · Open World · Crafting

Graveyard Keeper
Shared: Pixel Graphics · Crafting · Sandbox

Enshrouded
Shared: Survival · Adventure · Open World