If I complete challenges for Firefight offline, in custom Firefight, playing a game type I created where I changed the settings to be invincible, give my self a rocket launcher with bottomless clip, unlimited ammo, enabled a skull modifier (red, blue, or yellow) to make the enemy ai easier to kill. Is that cheating? For me, I lean more towards it being not, since it's intentionally designed that way. You can complete these Firefight challenges offline, and you can complete them with any custom made gametype for Firefight. I will say though, that it's a stupidly easy way to unlock everything. I kinda see it as an exploit.
Do you consider this cheating?
OP Dr Robaldnik