I downloaded the trial for Death Tank, merely on the fact that I've seen some people talking about it. I didn't actually learn anything about the game, but the fact that the community was talking about it got my interested.
I've played Worms before on several platforms and through several iterations, the latest one being on the Nintendo DS. I liked it as a simple, time-based source of fun. There's something to be said about the causal fun of a time-based game.
This is like Worms... sorta.
Death Tank is not casual, in fact is seems to make every effort to make your playtime as frantic as possible. That's not a gripe, but an observation. It's real-time, and with up to 8 players in tanks on the field it gets pretty insane. What's more, after about 1 minute a random bombardment from above begins, blowing away those unlucky enough to have lasted that long until there's one left.
There's a money system which allows you to rack up cash for kills to buy upgrades and weapons over the course of 20 matches. There's not a huge amount of available items, but I guess there could be more on the way at some future date.
It's fun, but I think the price of the full game (1200 points) is a little steep. Give it a shot with the demo and tell me what you think.