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Command your forces against endless waves of enemies in this intense RTS. Build bases, manage resources, and defend the Omega Beacon across procedurally generated worlds. Play solo or team up with friends via Steam multiplayer.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest starts Jul 20, 2026
Official stores with direct support.
Survive endless waves of enemies in this real-time strategy game. Build your base, manage resources, and defend against increasingly difficult attacks.
Key Features
• Wave-based RTS gameplay
• Build bases and train units
• Collect resources and unlock upgrades
• Multiple difficulty levels
• Steam multiplayer co-op (up to 4 players)
• Four different map environments
Gameplay
Construct buildings, train units, and survive enemy waves. Gather gold and iron to expand your base and unlock new technologies. Work toward building the Omega Beacon to achieve victory, or continue in endless survival mode.
Command infantry, artillery, tanks, and other units to defend your base. Build towers, walls, and production facilities to strengthen your defenses.
Right now the cheapest offer for Sigma Protocol is PLN 4.15 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Sigma Protocol is PLN 4.15 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Create a free price alert on this page and KingsPrice will email you when Sigma Protocol drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
