Games like EONIA
Games like EONIA include Crimson Desert Enhanced, Fallout 4, Hogwarts Legacy, Fallout: New Vegas, and The Elder Scrolls IV: Oblivion Remastered. We matched them by the tags players give EONIA on Steam (Open World, Action, Adventure, Indie, and RPG): closest matches first, and among equally close ones the better-known games.

Crimson Desert Enhanced
Shared: Open World · Action · Adventure

Fallout 4
Shared: Open World · Adventure · RPG

Hogwarts Legacy
Shared: Open World · Adventure · RPG

Fallout: New Vegas
Shared: Open World · RPG · Action

The Elder Scrolls IV: Oblivion Remastered
Shared: Open World · RPG · Adventure

Monster Hunter: World
Shared: Action · Open World · RPG

The Elder Scrolls Online - Standard Edition
Shared: Open World · RPG · Adventure

Assassin's Creed® Odyssey
Shared: Open World · RPG · Action-Adventure

The Forest
Shared: Open World · Adventure · Crafting

Slime Rancher
Shared: Adventure · Open World · Exploration

Starfield
Shared: Open World · RPG · Singleplayer

STAR WARS Jedi: Survivor™
Shared: Action · Open World · Adventure

Dragon's Dogma 2
Shared: Open World · RPG · Action

The Witcher 3: Wild Hunt — Remastered
Shared: Open World · RPG · Adventure

Rise of the Tomb Raider™
Shared: Action · Adventure · Open World

The Elder Scrolls IV: Oblivion® Game of the Year Edition (2009)
Shared: Open World · RPG · Adventure

Assassin's Creed® Origins
Shared: Open World · Action · RPG

Tainted Grail: The Fall of Avalon
Shared: Open World · Adventure · RPG

Far Cry® 6
Shared: Open World · Action · Adventure

Middle-earth: Shadow of War
Shared: Open World · Action · RPG

Cyberpunk 2077
Shared: Open World · RPG · Singleplayer

Grand Theft Auto V Legacy
Shared: Open World · Action · Adventure

Rust
Shared: Open World · Crafting · Adventure

No Man's Sky
Shared: Open World · Exploration · Adventure