UIFO Defense HD

UIFO Defense HD is a tower defense game in which you protect your base and its energy crystal cores from alien invaders. Use the terrain and build turrets to stop alien creatures and mechs from taking the cores, which are vital to your civilization’s science and technology.

Defend the cores

Each base contains 15 energy cores, and keeping them from being taken is your top priority. Build a defense line using energy, then recover energy by gathering it from defeated invaders. Choose turrets suited to different enemies to deal as much damage as possible.

Choose a difficulty

You can play on hard mode or switch to normal mode at any level if you encounter difficulty in hard mode.