How To Level Up Quickly (Offline)
Go to "Multi-player."
Go to Split Screen.
Sign in with 2 profiles. (You need 2 controllers and profiles).
Change the map to "Rust."
Go to Game Mode.
Put it on Headquarters
Go to Game Rules.
Put Number of Lives to 1 (This step is very important.)
Put Max Health to Miniscule.
Put Health Regeneration to None.
Start the match.
Use the main profile (the one you want to level up) to capture the headquarters... That gives you 2500 exp, then every 4-5 seconds after that you get 100 extra exp.
Let the game sit there move your person occasionally.
Added by: jtp0900 Aug 3rd 2012, ID#4786