Games like Viking Frontiers
Games like Viking Frontiers include Mount & Blade II: Bannerlord, Mount & Blade: Warband, Kingdom Come: Deliverance, Kingdom Come: Deliverance II, and Mount & Blade: With Fire & Sword. We matched them by the tags players give Viking Frontiers on Steam (RPG, Open World, Strategy, Medieval, and Simulation): closest matches first, and among equally close ones the better-known games.

Mount & Blade II: Bannerlord
Shared: Open World · Strategy · RPG

Mount & Blade: Warband
Shared: RPG · Open World · Medieval

Kingdom Come: Deliverance
Shared: RPG · Open World · Medieval

Kingdom Come: Deliverance II
Shared: RPG · Open World · Medieval

Mount & Blade: With Fire & Sword
Shared: RPG · Open World · Medieval

Mount & Blade
Shared: RPG · Open World · Medieval

Crusader Kings III
Shared: Strategy · Medieval · RPG

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Open World · Strategy

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

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

Sands of Salzaar
Shared: RPG · Open World · Strategy

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

Crusader Kings II
Shared: Strategy · Medieval · RPG

Kenshi
Shared: Open World · RPG · Sandbox

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

Crimson Desert Enhanced
Shared: Open World · Action · RPG

Fallout 4
Shared: Open World · RPG · Singleplayer

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Sandbox

Sons of Valhalla
Shared: Open World · Strategy · RPG

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

Freeman: Guerrilla Warfare
Shared: Strategy · RPG · Open World

Red Dead Redemption 2
Shared: Open World · Action · Adventure

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

Wartales
Shared: RPG · Open World · Medieval

