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A tower defense game supporting up to 4 players online, with various equipment to boost your power.
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
A 4-player co-op endless TD game with rotating lanes.
Choose from a wide variety of towers, equip powerful items to enhance their abilities, and survive 50 waves of enemies, including 4 mini-bosses and 1 final boss, across 5 difficulty levels.
Lowest tracked price: CA$2.07 (Jul 7, 2026) · current best: CA$2.59.
100% positive reviews all-time.
Right now the cheapest offer for 保卫实验室 (Defend the Lab) is CA$2.59 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 保卫实验室 (Defend the Lab) is CA$2.07 (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 保卫实验室 (Defend the Lab) 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.
