This thread is going to be a little bit different.
Now our aim isn't the big console games, but stuff like Xbox ARCADE games, indie games, iPhone/iPad and Android Apps, or DSi/3DS downloadable software. You get the picture. I'll begin.
Crystal Defenders, which is a Tower-Defense-style game made by Square Enix, has got to be one of my most favorite app-style games of all time. It's based off of Final Fantasy Tactics A2 and has also been featured as a downloadable game on various consoles and the iPhone and iPad (maybe also on Android phones). It has three levels of difficulty and four stages per level, with each level granting you different defensive units and privileges, like power crystals in the second and third.
So I've told you mine. What's yours?