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Defend the Castle
Click to play Space Builder Defender
Use your keyboard or mouse — every game runs right here.
Loads from play.gamepix.com · no download, no sign-up
Use your keyboard or mouse — every game runs right here.
About Space Builder Defender
Defend humanity's last hope in space by constructing and upgrading outposts against relentless alien attacks. Gather resources wisely, build strategic defenses, and face increasingly challenging enemy waves. Survive amidst a cosmic battlefield where timely decisions and resourceful upgrading determine the fate of human expansion.
How to play
- Keyboard or mouse — the game tells you what it wants.
- Touch-ready: rotate to landscape for the widest view, and use the fullscreen button on small screens.
