As most of you know knife master simply doesnt unlock sometimes. Its quite annoying when you complete the requirements for knife master and nothing happens. Well through much experimenting i have found a sure fire way to making it unlock everytime. I do this game for people so i get alot of practice at trying to make it unlock.

I hit a wall the other day trying to unlock this for a friend. I did it 8 times in a row no acheivement. So i tried something and well it worked. To make this acheivement unlock everytime heres what you do. Level one: DO NOT pick up the flame thrower avoid it. There are three powerups in the game the flamethrower,rocket launcher,and grenades. As long as you dont pick them all up then your ok. Dont pick up the flamethrower just the grenades and rockets.Ofcourse dont fire them either. I did this and it works everytime.Just remember dont pick up the flamethrower.

Interesting, I didn't even realise there was a problem with the achievement. I'll keep that in mind when I play this game (I've been saying that I'll play this game after finishing one of Centipede or Joust).

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Ok forget the first post heres how to do it for real. You must not pick up the powerups you must avoid them. Its tough to do but its what must be done to guarantee the acheivement. The only one i picked up is the rocket in the motor area of level 4.