Now THIS is a pleasant surprise. The first iteration in the Sentinel tower defense series has gone free, a game that was originally $4.99 and went as low as $0.99. It was a great game back in the day, and for free, you really can’t complain.
The sequel to Sentinel: Mars Defense, Sentinel: Earth Defense, was one of the best tower defense games we have ever played, warranting the sequel a Must Have. The first version isn’t far away though, and most of you will enjoy your playtime with the game.
Sentinel: Mars Defense went free in collaboration with the OpenFeint Free App of the Day and will be free until February 21st. I suggest everyone to go download it now, as you’re definitely missing out if you don’t.