Wanted to let all of you know about an XBL Arcade title that could turn out to be LOTS of fun...
Video at GameTrailers
From the video, this title reminds me a great deal of "Scorched Earth: the Mother of All Games", an old DOS game for the PC that I spent too much time playing. It's quite possible that Scorched Earth is the first game to boast destructible terrain, albeit in 2-D.
Here's the Download Page, the Wikipedia entry, and information on an updated 3-D version.
I've played Scorched Earth Vs. other human players, all sharing the same keyboard, taking turns. Each formulates his strategies and enters his moves (it was turn-based, if I remember correctly). Great fun to sit together and watch the outcome of each turn.
Multiplayer "Death Tank" (did it say 8 players?) should be a blast.