Kill Kotch before his speech ends.

Kick open a door, peek open a door, and throw a grenade while peeking a door.

All SDF Aces and Captains killed.

Complete Operation Pure Threat.

Complete Operation Trace Kill.

In Spaceland, find the MW1 and MW2 songs.

Complete Operation Safe Harbor.

Complete Operation D-Con.

Listened to all of the death letters of the fallen.

Go 2 minutes without double jumping or wall running in a mission where these abilities are available.

Kill 15 enemies with a zero G grappling hook.

Kill a C12 by doing a right rodeo, a left rodeo and by blowing off multiple limbs.

Kill the Wither.