I just downloaded it recently and it's alot of fun.
It's based off the Battlefield series, but it's a bit cartoony and free

Anyways so when you start you can make up to 4 players. Each has a side (British or German) and a class (SMG, MG, Sniper) that you can chose.
Also each class a 1-2 extra weapons (Missle launcher, Shotgun, Knife...)
I personnly use the shotguns as it takes a long time kill people with just a smg. Well it's really hard to kill in general.
Also each side has 2-3 Tanks 3-5 Jeeps and 2 Planes. Everytime one gets destroyed a new one is replaced near there base.
On to the gameplay.
So as I said it's hard to kill people, so don't always expect to get 10 kills in a match.
Im not sure how you win, but just protect your flags and get your opponents.
Theres only 3 zones right (It's in beta) And it does take a while on foot to get to places.
Controls are pretty good too, and there is little lag.

So if you wanna try it out go get a beta code. I got mine from gamespot so there giving out 60000 tommarow.

http://www.battlefield-heroes.com/news/giving-away-even-more-beta-keys <All the links to get a beta code

2 pics of me playing...


The full image: http://tinypic.com/view.php?pic=6st98o&s=5

yea........... i've played it but my computer couldnt fun it effectively but it was a really good game