The XCOM-esque tactical RTS Line of Defense Tactics has released on iOS, OSX, Android, and Amazon tablets today. As the name implies it is a tactical, squad-based RTS and based on the upcoming MMO Line of Defense.
Of course you do not need to have MMO experience or like MMOs to play it, LODT is not an MMO. However, if you do like MMOs, it uses the whole database of equipment, vehicles, etc., from the MMO.
Anyway, enough talking, you can watch the 9 minute gameplay walkthrough.
