Games like Project Abyss
Games like Project Abyss include Feed and Grow: Fish, Hand Simulator: Survival, Last Oasis, Don't Starve Together, and 鬼谷八荒 Tale of Immortal. We matched them by the tags players give Project Abyss on Steam (Action, Adventure, Indie, Simulation, and RPG): closest matches first, and among equally close ones the better-known games.
Feed and Grow: Fish
Shared: Simulation · Action · Survival
Hand Simulator: Survival
Shared: Adventure · Survival · Simulation
Last Oasis
Shared: Action · Adventure · Survival
Don't Starve Together
Shared: Survival · Adventure · Indie
鬼谷八荒 Tale of Immortal
Shared: Simulation · RPG · Action
Rust
Shared: Survival · Adventure · Action
Home Behind
Shared: Adventure · Indie · RPG
Dead Age
Shared: RPG · Adventure · Survival
The Forest
Shared: Adventure · Survival · Action
Terraria
Shared: Survival · Adventure · Indie
Bum Simulator
Shared: Adventure · Action · Simulation
Flesh Eaters
Shared: Action · Indie · Adventure
Once Human
Shared: Action · Survival · Adventure
Kenshi
Shared: RPG · Survival · Simulation
SKYHILL
Shared: Adventure · Indie · Survival
Home Behind 2
Shared: Adventure · RPG · Indie
OMON Simulator
Shared: Action · Simulation · Indie
Mount & Blade II: Bannerlord
Shared: RPG · Action · Simulation
DOKA 2 KISHKI EDITION
Shared: Action · Indie · Simulation
The Isle
Shared: Survival · Simulation · Adventure
The Escapists
Shared: Action · Simulation · Indie
Dust: An Elysian Tail
Shared: Action · Indie · Adventure
Remnant: From the Ashes
Shared: Action · Adventure · RPG
Between the Stars
Shared: Action · RPG · Simulation