best and fastest way to get keycodes??

[schobes]

best way since one d bag messed up mine 99.....co op. chronkite bunker is fast and gives u 6k and 5 keycodes, and u can complete ur co op recorders and stuff along the way....
anyone else have any better ideas, if so message me. i will be deleting pst soon so they dont reduce the keycodes more. they want us to spend more money and buy bits.....never will i ever pay more than 60 total for any video game. i earn rewards in game...like a man

[Zabuza]

Get a good Detonator (Ground Pounder, Big boomer, matchlock isn't too bad.) Then get the perks; Deadly Cascade, Pinata and Just reward. Most your loot will come from Pinata, but on occasion (if your max dmg radius hits the crit box? I really don't know how I get crit kills with the Det) it will give you a critical kill. Grab all loots and constant salvage. Best places are co-op missions or anywhere large amounts of enemies concentrated in an area.

[EvilWaterman]

Real money