Regnum Idle

Build an unstoppable Viking empire through automated battles. Harvest resources, recruit Vikings, equip them with 100+ weapons and armor, and watch them dominate! Upgrade weapons endlessly, defeat legendary bosses, and unlock powerful upgrades. Your army grows stronger, even while you're offline

At a glance

• Platform: Windows.
• Genres: Action, Casual, RPG, Strategy.
• Release date: Mar 26, 2026.
• Steam user reviews: Mixed (63% positive).
• Delivered as a Steam library entitlement — activation is handled by Steam.

Minimum

Recommended

System requirements as published by the developer on Steam.

Activate on Steam

• Open the offer above — it takes you to this game's official Steam store page.
• Buy it there, or if you bought a key elsewhere, open Steam and choose Games → Activate a Product on Steam.
• Enter the product code exactly as it was issued to you.
• The game appears in your Steam library — download and play.

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