Digitanks is a turn-based artillery game. Set up your base, build a fleet of tanks, and attack your enemies without mercy.
Digitanks is an enjoyable turnbased strategy game. The 'traditional' strategy mode is quite slow paced, so it may not appeal to everyone, but I for one don't mind playing slow paced games.
I get the feeling that the units aren't balanced that well, although it could also be that I just need to learn how to use them effectively. There is some base building involved, but there are only a few different buildings, which in my opinion is a pro because it puts the focus on combat rather than turtling and building a huge base (although building a huge 'base'/supply network is necessary in order to get a nice and steady income of resources).
There is also an 'artillery' game mode. In this mode each player starts with the same amount of artillery units and the goal is to destroy the enemies before they destroy you! There is no base building involved and this mode is quite fast paced, so it's great for playing in a lunchbreak or something ;)
Anyway, I would say that this game is definitely worth the price and if you like turnbased strategy combat games I can really recommend Digitanks! (Also: it has deformable terrain.. and as I'm a sucker for dynamic terrain and such that's what makes this game extra awesome in my opinion! :P)