The SYSTEM folder under the installed folder, edit the USER.INI file. At the end of the file in the [XMenu.NewCharacterWindow] section, are the lines describing the available player slots. The following line will start the game, using the first slot, with maximum health, weapons, abilities, powerups, and all skins unlocked:

SavedEnforcers[0]=(Name="Player",Difficulty=1,CurrMap=0,MaxHealth=400,
speed =1.000000,Targeting=0.000000,RepairRate=3.000000,Ammo=2.000000,
Jump=2.000000,ResearchPoi nts=9999,WeaponUpgrades[0]=4,
WeaponUpgrades[1]=4,WeaponUpgrades[2]=4,WeaponUpgrades[3]=4 ,
WeaponUpgrades[4]=4,WeaponUpgrades[5]=4,WeaponUpgrades[6]=4,
WeaponUpgrades[7]=4,Weapo nUpgrades[8]=4,WeaponUpgrades[9]=4,
WeaponUpgrades[10]=4,WeaponUpgrades[11]=4,WeaponUpgra des[12]=4,
WeaponUpgrades[13]=4,WeaponUpgrades[14]=4,WeaponUpgrades[15]=4,
WeaponUpgrade s[16]=4,WeaponUpgrades[17]=4,WeaponUpgrades[18]=4,
WeaponUpgrades[19]=4,WeaponUpgrades[20 ]=4,WeaponUpgrades[21]=4,
WeaponUpgrades[22]=4,WeaponUpgrades[23]=4,WeaponUpgrades[24]=4,
WeaponUpgrades[25]=4,WeaponUpgrades[26]=4,WeaponUpgrades[27]=4,
WeaponUpgrades[28]=4,We aponUpgrades[29]=4,FinishedGame=1,
XBaseSkinName="EnforcerTrooperBaseSkins.BlueDemon")


Note: The above 14 lines are all on *one* line in USER.INI.

By changing the "CurrMap=" section, any of the 40 available maps can be accessed.