[dreaddraco2]

Title says all. Be reasonable.

Name: John McClane
Gamerscore: 15g
How to get: Destroy a hornet or banshee by driving a chopper into it in ranked playlists.


Name: Car Trasher Spree
Gamerscore: 10g
How to get: Destroy 5 warthogs in a row (with drivers) without dying in ranked playlists.

[HydroZoid]

title: Red Devil
goal: get 10 kills with a single spartan laser without dieing.
25g

[Crypto nv]

Name: Rise of the cones
Gamerscore: 25g
How: Get a cone splatter spree

[dreaddraco2]

Name: Terra Nova
Gamerscore: 10g
How to get: Create 10 Custom Map Variants.

[ehand88]

Name: Gettin' Head
Gamerscore: 25g
How to get: Get 5 headshots in a row without dying in a ranked playlist

/lul

[Loscocco]

1: I would probably mimic the Gears of War weapon achievements (100 kills with pistol, 100 kills with snipers, 100 headshots, 100 rocket kills, etc...)

2:
Name: Road Rage
Gamerscore: 15g
Description: Get 15 wheelmen in one game

Name: Steaktacular
Gamerscore: 20g
Description: Get a steaktacular.

Name: Kiss the cook
Gamerscore: 25g
Description: Successfully cook an enemy by killing them with a plasma pistol.

[shockwavekp44]

1.
Name: The Ammunition Store
Gamerscore: 50G
How to get: Get 100 kills with every gun.

2.
Name: Ninja Gaiden
Gamerscore: 25G
How to get: Get 10 Assassinations in any ranked playlist.

[AmercanPsycho]

Name: It's pure skill! Or luck...
Gamerscore: 50G
How to get: Get a killionaire in any social playlist other than zombies and grifball.

If you haven't seen, Phurion's Guide to Making a Halo 3 Montage, you probably won't get the reference.

[IH8YourGamerTag]

Wheelmaster-

get 50 wheelman medals on big team slayer in the warthog only.

my record is high 30-something. difficult.

[Farbeef]

Fishsticks -25g
get five sticks in a match on longshore