Trallafitti
Getting There
There you go:
Now They Fly?
Get a kill while airborne in a Warthog.
Size Is Everything
Kill 20 enemies with a detached Machine Gun Turret.
ODST
Kill a player while you're airborne from using a Man Cannon.
Bigfoot
Kill 20 enemies using the Mantis' stomp attack.
David and Goliath
Board an enemy Mantis.
Clay Pigeon
Shoot an enemy out of the air while they use the Man Cannon.
Special Delivery
Kill an enemy with a melee attack when landing from a Man Cannon.
Pump Yer Brakes
Score the killing blow on a Mantis
Source:
http://blogs.halowaypoint.com/Headlines/post/2012/12/04/Halo-4-Crimson-Map-Pack-Achievements.aspx
Now They Fly?
Get a kill while airborne in a Warthog.
50 points
Size Is Everything
Kill 20 enemies with a detached Machine Gun Turret.
20 points
ODST
Kill a player while you're airborne from using a Man Cannon.
30 points
Bigfoot
Kill 20 enemies using the Mantis' stomp attack.
20 points
David and Goliath
Board an enemy Mantis.
20 points
Clay Pigeon
Shoot an enemy out of the air while they use the Man Cannon.
40 points
Special Delivery
Kill an enemy with a melee attack when landing from a Man Cannon.
30 points
Pump Yer Brakes
Score the killing blow on a Mantis
Source:
http://blogs.halowaypoint.com/Headlines/post/2012/12/04/Halo-4-Crimson-Map-Pack-Achievements.aspx
40 points