If you prefer to keep your own character progress but want immediate access to all weapons, you can use a command line argument on PC. :
"Let's see what real power feels like," Leo muttered. Far Cry 2 All Weapons Unlocked Save Game
He drove toward the convoy mission that had stumped him. He saw the trucks ahead, the warlords guarding the route. In a normal playthrough, this was a thirty-minute engagement of hit-and-run tactics. Leo didn't stop. He didn't slow down. If you prefer to keep your own character