Halo 4 Cheats :
Secret - Crimson Map pack: 2 Achievements at the Same Time
There is an easy way to get David and Goliath (20G) and Pump Yer Brakes (40G) at the same exact time.
All you have to do is sneak up behind an enemy Mantis, and board it, which is where you will get David and Goliath. Next, you will need a grenade, sticky or frag, and stick it to the Mantis. Quickly jump off, grenade will explode, and you'll get Pump Yer Brakes.
Two quick and easy achievements for the Crimson Map Pack.
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