Sentinel: Mars Defense


Featured in Apple's App Store Turns 1
top games list!

It’s war. Earth’s first off-world colony is fighting for survival against a savage alien onslaught. Mars is under siege and thousands of lives are on the line. Humanity’s only hope is you, the commander of the dropship Sentinel.
Protect key structures which block the enemies’ path as the aliens smash their way towards your stronghold. Utilize an array of advanced technology including upgradeable towers and droids which can repair buildings or harvest resources.

Good luck, Commander!

  • Tactical and unique gameplay which takes tower defense to the next level.
  • Use the landscape and destroyable defenses to maximize the effectiveness of your weapons.
  • Beautifully rendered environments, towers and enemies.
  • Endurance mode to challenge the most hardened of players.
  • Challenge your friends directly to beat your high score.
  • Fast-forward toggle to speed up play for advanced players.
  • Save your progress whenever you want. Automatically saves during a call.
  • High score leaderboards and achievements using GameCenter!
Developed by

Programming & Design

Paul Jackman

Graphics, Design & SFX

Laurence McDonald


BITS Studios


Jez San