Call of Duty: Advanced Warfare

If you like the game mode and play regularly, this achievement will come over time.

If you are here looking for a quick way to boost this you can set a private game on a Tier 1 map, let the enemies kill you and repeat. I can't confirm quitting works, but dying on the first wave does.

IReal Shadow pointed out that you can cook your own grenade to kill yourself as soon as the match starts and make this go even faster.

Alternatively, If you jump off the map you don't need to wait for enemies to spawn or for self-revive to pick you up.

**Update**

According to Eskobar M92, you can quit out of the game during the countdown after picking your class and it will still count as a game played.

The fastest and easiest way to get this is: Host a private match on your own. When game starts, just pick a class. Then quit straight away. You don't need to wait the timer go to zero.

Important! This achievement is little bit buggy. If you already have this achievement on xbox 360 then you can't get it done on xbox live games. You need to play it on local. Everything else is same. I can confirm that myself. I played 50+ games on xbox live, but nothing. Then I played local games and get it after game 50

I hope they will fix that buggy soon. And I will edit this solution, when they do.
This achievement is still buggy 22.1.2016 Probably never get fix

Although this may seem like it will take a lot of time, I can happily tell you that this achievement can be done in about 6 hours if you follow the step by step guide that I'm going to list below. Also in this guide you'll be able to unlock the achievements;






(1) Now the first thing you'll want to do is get in a private match, I also recommend having 3-4 players to make this achievement faster!
(2) select the map bio-lab and set the difficulty to regular.
(3) during this map you'll want to play it normally and try and flip the map twice (see flip flop achievement for more details). Make sure to use team work and communication. The best spot to do this is in the room where you have the Exo Upgrade box, have one watching mid hallway, 2 on the right stair case and one on the door. Beat 50 waves and unlock tier 2.
(4) now tier 2 in a tricky one as you need to get 75 rounds and the enemies seem a little more aggressive in this mode but choose the map Instinct and we're going to try a new stratergy which we will improve upon in tier 3 and make the 100 rounds an easy thing to do within an hour.
(5) on the map instinct there are some buildings down near a big bulldozer like thing. The building to the left of where the Exo upgrade is will be the fastest spot on this map! You'll want to camp in here with 3 watching the front and 1 watching the back Untill the supply drops come in.
(6) now what you're looking for is a Aerial Assult Drone I. One of the drops. Once round 5 starts use it and it will obliterate the enemy drones. Now that you've done that let the whole team down themselves (I'll explain why shortly). Keep repeating this process and you'll get faster and faster and can beat each 5 rounds in 3-4 minutes.
(7) alright now the video guide below will show you how it should be done if you're having trouble but you'll want to go to teir 3 once unlocked and choose the map Greenband. choose 3 heavys & the light class. Once round one starts use the uav and kill everything as fast as possible, repeat this process for round 2 also.
(8) now round 3 will start, you'll want to complete this objective as fast as possible and kill the eniemes. You'll be tasked with;
- defend the hard point
- gather the intel (0/3)
- collect the dog tags (0/20)
- defuse the emps (0/3)
Once complete have the heavys drop the goliaths for the next round which is dogs.
(9) when the supply drops come down, doing what you did on instinct, grab the assult drones and throw them up at round 5. You'll beat the round in 10-20 seconds & once you've done that ready up and jump off the edge when a new round starts.
(10) this will now end the round and you will have 5 off your 100. Keep repeating this and you can speed run this in 3-4 minutes each run.

Now why do this method? Why not play normally?!
Well because they start getting tougher after round 5, it makes going up the rounds harder and the enemies only get worse so jumping in doing 5, jumping out, jumping in doing 5, jumping out is the fastest method for this giving you 20 games complete out of 50 + the 15 for instinct and one for BioLab so you'll have (36/50) by the time you reach riot!
Now switch your class everytime you hit 30 minutes (can see time at ending scoreboard) and you'll unlock the class warfare achievement.

I hope this helped you guys and if there's any dislikes leave the reason below :)

IMPORTANT NOTE: Comment from Brad Pitt#1331 "If you've done it on x360 before this one. You need to do it in local play. Thanks goes to v AggressoR x to comfirming me that......" this worked for me when it wouldn't pop in xbox live play.