Space Mercenary Defense Force
Defend against the alien invasion and take down the mother ship! Utilise branching upgrade trees, unlock new ships, and equip permanent upgrades to create your own unique build and defeat the growing hordes of invaders in this sci-fi action roguelike!
0 playing now · 5 h ago
Price history and discounts
Current price: $4.99. All-time low: $4.99 (low recorded on 09/05/2026). Now is the best time to buy — the price matches the all-time low.
We track Steam prices automatically and update them within minutes of any change. The chart shows how the price changed over time and helps you decide whether to buy now or wait for a discount.
Prices in other regions
Brazil
R$16,99
Europe (€)
4,99€
United Kingdom
£4.29
Kazakhstan
1 500,00₸
Ukraine
124,00₴
Screenshots
System requirements
Minimum
Minimum:
- Requires a 64-bit processor and operating system
- OS: Windows 10 64bit
- Processor: Dual Core+
- Memory: 2 GB RAM
- Graphics: 2GB VRAM
- Storage: 500 MB available space
Recommended
Recommended:
- Requires a 64-bit processor and operating system
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Recent price changes
| Change | When |
|---|---|
| Data is being collected — first cycle in progress, check back soon | |