Originally Posted by DarkAp
Halo Waypoint says I've 21 kill with the Mantis stomp, still no achievement.
I hate 343.
At this point I think stomping vehicles doesn't count, and I've 4-5 kills with this.
I can go ahead and say that stomping vehicles DO count for the total since I'm pretty sure I unlocked it at 21 kills WITH at least 5 vehicle stomps.