good
ok im kinda pissed...the game was great and stuff...but if u say it is based on physics and logic then that is bullshit. examples: there is a chopper flying, it is impossible to destroy it! im banging crates against the rotor with the gravity gun, it still flies, i fire it with 3 rockets, it is still flying, i am firing it with an ak-47, it still flies, then i block the bullets coming from the chopper with the crate and i am unable to build a wall of those to get passed and finally, it is full off bugs: suddenly i cannot move anymore and i fly against a wall and can`t go away anymore, or i just start spinning around. lol sad, i would have wanted to play it to the end, but it was full of bugs so...had to quit it i will give a 8 to it because of those faults, after all good game