Games like The Prison
Games like The Prison include Warframe, SMITE®, Guild Wars 2®, Neverwinter, and Blue Protocol: Star Resonance. We matched them by the tags players give The Prison on Steam (Action, RPG, Strategy, MMORPG, and Turn-Based Tactics): closest matches first, and among equally close ones the better-known games.

Warframe
Shared: Action · RPG · Massively Multiplayer

SMITE®
Shared: Action · Strategy · MMORPG

Guild Wars 2®
Shared: MMORPG · RPG · Massively Multiplayer

Neverwinter
Shared: RPG · MMORPG · Action

Blue Protocol: Star Resonance
Shared: Action · MMORPG · RPG

Star Trek Online
Shared: RPG · MMORPG · Massively Multiplayer

The Elder Scrolls Online - Standard Edition
Shared: RPG · MMORPG · Action

Albion Online
Shared: MMORPG · RPG · Massively Multiplayer

FINAL FANTASY XIV Online
Shared: RPG · MMORPG · Massively Multiplayer

SMITE 2
Shared: Action · Strategy · Third Person

Mount & Blade II: Bannerlord
Shared: Strategy · RPG · Action

Marvel Rivals
Shared: Action · RPG · Strategy

Predecessor
Shared: Action · Third Person · Strategy

Gloria Victis: Medieval MMORPG
Shared: MMORPG · Action · RPG

XCOM 2
Shared: Strategy · RPG · Turn-Based Tactics

Monster Hunter: World
Shared: Action · RPG · Third Person

MONSTER HUNTER RISE
Shared: Action · RPG · Character Customization

Last Oasis
Shared: RPG · Action · Massively Multiplayer

Dragon Age™: The Veilguard
Shared: RPG · Strategy · Action

SpiritVale
Shared: MMORPG · RPG · Massively Multiplayer

Path of Exile 2
Shared: RPG · MMORPG · Action

DRAGON BALL XENOVERSE 2
Shared: Action · RPG · Massively Multiplayer

Notes of Soul
Shared: Action · Massively Multiplayer · RPG

NARAKA: BLADEPOINT
Shared: Action · Massively Multiplayer · Character Customization