Osiris is the first mission of Halo 5: Bird Watching. It starts with Locke getting orders from 343i to kill the rabid haters trying to destroy their operations. After their talk, Locke flips everyone off, saying "You're playing as me 80% of the game, idiot!" then jumps off a pelican but uses hax, so doesn't die but instead kills almost all 343i haters and destiny fanboys. you then walk through a ice thing and do shit before you kill the 343i hater leader, Jul Mdama. Locke then proceeds to say "You speak nothing but kindness of 343 or get silenced" and stabs him a million times.