Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
Apprentice Terminator (15 points)	You've achieved a 10,000 point combo!
Arsonist (20 points)	You killed 300 monsters with fire!
Collector (30 points)	You've found all the weapons!
Cooperation (15 points)	You have completed a mission in 2 player local game mode!
Disintegration (50 points)	You scored 300,000 points in a single game!
Fun (15 points)	You have completed an online multiplayer game!
Healer (15 points)	You healed a character on the ground 10 times in multiplayer mode!
Massacre (30 points)	You've killed 1,000 monsters!
Perfectionist (40 points)	You got the gold in every mission!
Rock hard! (50 points)	You have completed all the missions in the game in "Rock Hard" mode!
Slaughter (20 points)	You killed 500 monsters with the chainsaw!
Temptation (20 points)	You launched the 4 special skills specific to one character in a single mission!
Terminator (30 points)	You've achieved a 50,000 point combo!
This is only the beginning (20 points)	You have completed all the missions in the game!
Top of the class (20 points)	You won the golden glove on one mission!
Who's the strongest? (10 points)	You exterminated 3 hordes!