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Lead a squad into the ruins, scavenging resources while fending off relentless swarms. In this unique, expansion-style tower defense game, explore regions, grow your forces, and stop the cataclysm to save humanity.
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
The Old World is Gone. Can You Build a New One?
The Swarm consumed civilization. Now, survivors cling to life in rusted strongholds. But you—guided by a forgotten starship—dive into the ruins, leading a squad to scavenge, fight, and uncover the truth.
The fog hides monsters... and miracles. Lost technology waits in the wreckage—use it to tip the scales.
Enemies strike without warning. No static defenses—push forward, fall back, outmaneuver. Every map is a new nightmare.
Turrets are ammo, not assets. Drag them, break them, modify them. Your only rule: survive.
You’re not just a soldier—you’re an engineer, a strategist, a leader. Research, craft, and turn scraps into salvation.
Right now the cheapest offer for Under the Ruin is CA$7.79 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 Under the Ruin is CA$6.62 (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 Under the Ruin 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.
