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Build your ultimate defense with a combination of powerful towers. Attack your opponent with strong Invaders. This game is sure to offer a unique and immersive experience for all tower defense enthusiasts!
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 Social Deduction Fest ends
Official stores with direct support.
Invaders Tower Defense Online (ITDO) is an exciting strategy game that combines attack and defense elements. Get ready to build your ultimate defense with a combination of powerful towers and face your opponents with strong invaders. This game offers a unique and immersive experience for all tower defense enthusiasts!
Key Features:
1. Balance between Attack and Defense:
Start with 400 credits and 100 lives to defend.
Receive an income of 200 credits per round.
Invaders that cross the board reduce their lives.
Sending raiders costs credits, but also increases your income.
Each round lasts 12 seconds.
2. Variety of Invaders and Towers:
Fight over 30 different types of attackers. Each attacker has specific abilities and weaknesses.
Choose from over 15 types of towers to strategically position. Each tower has its own characteristics and abilities.
3. Maps and Game Modes:
Explore over 10 different maps, each with unique challenges.
Try different game modes:
1v1 Duel Mode: Take on another player in exciting matches.
2v2 Team Mode: Form a team with a friend and fight against another duo.
Free-for-All (FFA) mode: All against all! Be the last player standing.
Matches against AI: Hone your skills against artificial intelligence.
Defense Mode: Survive as long as you can against waves of increasingly stronger invaders.
Right now the cheapest offer for Invaders Tower Defense Online is CA$1.94 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 Invaders Tower Defense Online is CA$0.97 (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 Invaders Tower Defense Online 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.
