Sentinel 2: Earth Defense


It’s war, and this time it’s too close to home. The Martian mission may be over, but the aliens haven’t finished playing space invaders yet.

Extraterrestrial eyes have turned to a new target: they want Earth, and you’re the one that has to say ‘no’.
Welcome to the future of Tower Defense.

Good luck, Commander!

  • Unleash the Sentinel's incredible ship weapons system - if you've got the power to do so...
  • Deploy mobile attack drones to harass the enemy and augment static defenses.
  • Construct boosters to buff your offense, and upgrade to top-tier towers for devastating special moves!
  • Pit yourself against previously unseen members of the star spawned horde.
  • Mission mode provides quick tactical challenges. Beat a scenario to earn achievements!
  • High score leaderboards and achievements using GameCenter!
  • Visually stunning environments, towers and enemies with fluid zooming and scrolling.
  • Exclusive new music written by Specimen A.
  • IAP for more custom maps!
Developed by

Programming & Design

Paul Jackman

Graphics, Design & SFX

Laurence McDonald


Specimen A


Jez San