DeDs

Forerunner

Halo 4: Complete Forerunner.

Gruntageddon

Kill 1000 Grunts.

All Out of Bubblegum

Collect 1,000 campaign or playlist medals.

Knee-Deep in the Dead

Complete the campaign on 'I'm Too Young to Die', 'Hurt Me Plenty', 'Ultra Violence', or 'Nightmare'.

Who's Next?