So as some of you know it is possible to gain perks permanately from doing certain challenges.
It has nothing to do with your overall all stats (Despite the fact that everyone thinks that), so it has to do with what you get in one game.
Below is a confirmed list of how to get perks that will be updated once more info is found out

Quick Revive: Around 15 revives in one game. My friend needed 18 and I needed 16. Not sure if there is some sort of algorithm

Now that is all I know for now, and below is rumors

Jugg: Getting hit by a certain amount of zombies
Stamin-up: Traveling/Walking a certain amount of miles
Faster knifing and Speed Cola: Knife a certain amount of zombies
Tombstone: Certain amount of deaths
Double Tap: Certain amount of bullets fired


Note: I believe you must do the "challenges" in TranZit and I know the perks only work in TranZit