Games like Arakion: Book One
Games like Arakion: Book One include Legend of Grimrock, Legend of Grimrock 2, The Elder Scrolls IV: Oblivion Remastered, Might & Magic X - Legacy, and The Elder Scrolls IV: Oblivion® Game of the Year Edition (2009). We matched them by the tags players give Arakion: Book One on Steam (RPG, Adventure, Early Access, Grid-Based Movement, and Dungeon Crawler): closest matches first, and among equally close ones the better-known games.

Legend of Grimrock
Shared: RPG · Dungeon Crawler · Grid-Based Movement

Legend of Grimrock 2
Shared: RPG · Dungeon Crawler · Grid-Based Movement

The Elder Scrolls IV: Oblivion Remastered
Shared: RPG · Adventure · Singleplayer

Might & Magic X - Legacy
Shared: RPG · Dungeon Crawler · Grid-Based Movement

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

Fallout 4
Shared: RPG · Adventure · Singleplayer

Hogwarts Legacy
Shared: Adventure · RPG · Singleplayer

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

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

Pillars of Eternity
Shared: RPG · Adventure · Fantasy

The Elder Scrolls III: Morrowind Game of the Year Edition
Shared: RPG · Adventure · Fantasy

Tainted Grail: The Fall of Avalon
Shared: RPG · Adventure · First-Person

Fallout: New Vegas
Shared: RPG · Singleplayer · Adventure

Wizardry 8
Shared: RPG · Dungeon Crawler · Party-Based RPG

Clair Obscur: Expedition 33
Shared: RPG · Fantasy · Adventure

The Bard's Tale Trilogy
Shared: RPG · Dungeon Crawler · Grid-Based Movement

Slime Rancher
Shared: Adventure · Singleplayer · First-Person

Archaelund
Shared: RPG · Adventure · Early Access

Crimson Desert Enhanced
Shared: Adventure · Singleplayer · RPG

Icewind Dale: Enhanced Edition
Shared: RPG · Adventure · Party-Based RPG

The Quest
Shared: RPG · Adventure · Dungeon Crawler

STAR WARS™ Knights of the Old Republic™
Shared: RPG · Adventure · Singleplayer

Kingdom Come: Deliverance II
Shared: RPG · Adventure · Singleplayer

Pathfinder: Kingmaker - Enhanced Plus Edition
Shared: RPG · Party-Based RPG · Fantasy