One of the more expensive XNA Community Games out there at 800 Microsoft Points (about 10 bucks), this might detract some players given that it’s a Community Game; however, the sharp, professional quality mixed with addictive gameplay and expansive game selection makes Biology Battle quite the bargain.
As fun and addictive as it is, though, it's still a basic shoot 'em up which you would be likely to quit were you handed any higher profile titles. The real-time ranking system is inspired, particularly for the stat whores amongst us, and multiplayer is of reasonable appeal, but Biology Battle is still only a time waster rather than a truly enveloping game.
A workable contender in the Live Community, Biology Battle is a worthy addition to the shmup library, but whether or not players will want to throw down 800MS over other Live titles could keep this quirky shoot 'em up from the ranks inhabited by better games.
Although quite basic in it’s nature, Biology Battle is a very fun and addictive game to play, so whether you are playing single player or versus you will find this hard to put down while playing. The only thing that may put people off the game is the 800 MS points price tag, however if you do part with the points you shouldn’t be too disappointed.