Ive searched for cheatcodes for Contra Force so I can get alot of extra lives and I found these 2 so far:

- Hold B, press start
- Press Up, Up, Down, Down, Left, Right, Left, Right, A, B, Select Start

These are supose to be done at the startmenu, but I cant get any of them to work. According to the websites where I found them these codes should give you 30 extra lives.

Anyone have a valid cheatcode or am I doing something wrong?