Crystal War is free today only. Its my favorite side-scrolling strategy title (like Cartoon Wars). Tons of units + leveling makes for good strategy + addictiveness. Two playable races with separate campaigns, plus endless mode. Recommend it strongly at free.
It's listed at $.99. It was free for a day a week ago. I picked it up then and it is definitely a great little game. I've been playing it all week and still am playing it between Infinity Blade bloodline playthroughs.
Sorry guys, the developers didnt update their facebook status. I saw "Free Sunday, only four hours left!" as the current status, lol. Never occurred to me they meant *last* Sunday.