Codes dont work on Single Player

[)) sasuke ((]

yea not all of the codes active on single player ..

but the important codes like inf health, inf ammo.... (( i think )) works in sigl pla ...

::: BUT :::

the (( infinity health )) is not good in sigl pla ... bcus with it u can't kill the enemy )) im not very sure ((

u have to use 9999 code or 1929304 i think like that ... this code will help u to kill them and u don't die