Hello, I've picked up Far Cry 1 recently on the mission of beating it! However, I am stuck at a certain point and I've tried to cheat... I changed the .lua file and entered devmode. I cannot get the cheats to work and I humbly ask if anyone else has gotten this to work. Hopefully, after I get past this spot, I'll play fair.

Did you read here?
http://forums.ubi.com/eve/forums/a/tpc/f/452106891/m/858002217

Also, you need to make the file you changed read only so it is not overwritten.