This app was mentioned in 8 comments, with an average of 1.50 upvotes
Just found out that the first 6 missions on the Android version are free. So if you have a good enough phone or tablet you can try it out. Note the first 3-4 missions are tutorials. The price on the android market seems reasonable too ($4 to unlock the full game, and $3 for each of the add on campaigns. The normal price on PC Is $14.99 for the game and I think $5 for the add on campaigns).
Bad Bot! No cookie!
Have you tried Ironclad Tactics?