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Beware Planet Earth! is a beguiling mix of classic tower defense and time management coming to PC via Steam for the first time. Save your cows from the Martian invasion by building an effective defense using towers, traps and objects, and also by firing your Zapper directly at the invading force of little green men!
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
How it worksTracked since Jul 7, 2026.
Steam Train Fest starts Jul 20, 2026
Official stores with direct support.
Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →
Try this game before buying.
Beware Planet Earth! is a beguiling mix of classic tower defense and time management coming to PC via Steam for the first time. Save your cows from the Martian invasion by building an effective defense using towers, traps and objects, and also by firing your Zapper directly at the invading force of little green men!
Exclusive content on Steam: a multitude of new levels and enemies inspired by Valve’s universe!
Endless Fun: full story mode with 46 levels over 4 seasons, plus 28 bonus challenges!
Simple gameplay: different difficulty modes to choose from; “Veteran Mode” for experienced players and “Normal Mode” for the beginners
Intense action: grab your Zapper to attack the Martians and overpower your machines!
Wacky machines: choose among 20 wacky machines; from the classic defence tower to the Helicowpter!
Deadly enemies: over 20 quirky Martians; from the Metalhead and the Mad Scientist to the Ninja!
Right now the cheapest offer for Beware Planet Earth is CA$1.01 at Eneba. KingsPrice compares 4 offers from 4 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Beware Planet Earth is CA$0.95 (recorded on Jul 16, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →
Create a free price alert on this page and KingsPrice will email you when Beware Planet Earth 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.
