Redeem the required number of Arkfall codes (at the Defiance "My Ego" System website) to unlock special bonuses which can then be claimed in the in-game Defiance Store.

Unlockable	Number of Codes required
Level 1: +2 Inventory Slots	1
Level 2: VBI Recruit Title	3
Level 3: Bonus Ark Salvage	6
Level 4: Basic Lock Box	10
Level 5: Pistol Skill +1	15
Level 6: Light Machine Gun Skill +1	21
Level 7: Manual Sniper Rifle Skill +1	28
Level 8: Assault Rifle Skill +1	36
Level 9: +4 Inventory Slots	45
Level 10: Pump Shotgun Skill +1	55
Level 11: Firestorm (Weapon Modification)	66
Level 12: TMW Hannibal 650R Vehicle (Location: Iron Demon Ranch)	78
Level 13: Thundershock (Indoor Firing Range)	91
Level 14: Scavenger Ego Perk (Increases ammo drop by up to 30%)	105
Level 15: VBI Operative Title	120