It may look like it was made as a grade 10 computer science project but Hoplite is an awesome game. Simple set of rules but excellent game design keeps things interesting and compelling throughout. Lots of tactical decisions to be made fighting through level by level and there is also an element of strategy in the upgrades/level ups you choose. A perfect example of a short and sweet ios game for a serious gamer.
Secret Lan about Hoplite, v2.2.2