Call off the Strike
Complete Fort 14 without using the Airstrike

Gone Bananas
Complete Fort 16 by using the Banana Bomb

Holy Moly
Complete Fort 11 by using the Holy Hand Grenade

Dream Team
Complete Fort 19 without losing a worm

Stalwart
Complete Fort 17 without vital worm taking damage

Soak-Crates
Collect the vital crate on Fort 18 before sudden death kicks in

Death Matched
Complete any deathmatch mission

King's Defender
Complete any defend vital worm mission

Crate Scott
Complete any vital crate mission

Vital Ballistics
Complete any kill vital worm mission

Bridge Burner
Collect the vital crate on Fort 13 without using the Bridge Kit

Head Hunter
Complete Fort mission 20