Left 4 Dead

There's been lots of people saying the achievement is glitched, the whole DLC is fairly buggy, if you're playing solo the achievement will unlock without any issues, if you want to play online with friends and get the achievements you'll need to do the local server trick,

Now for those of you who don't know what the local server trick is, what you have to do is set up the lobby as you normally would, invite friends etc, when you're ready to start up, press "A" to start and then just keep pressing it, it'll start the load up and cancel it over and over, within a minute the menu will lockout which will prevent you from cancelling but the game will continue loading, this means you've succesfully managed to pull it off, if you cant seem to get it to work try pressing "A" faster, it does work, I promise.

A big fat warning though, while there are no serious consequences to this, i.e. you wont get banned because it's not tampering with gameplay, it doesn't breach any rules! It does sometimes crash your Xbox, if that does happen just turn it off and on again, boot up and restart the process.

Now for this achievement what you need to do is either reach the finale or just start from the finale, activate the three generators, you don't need to start them all at once for this achievement so if you want you can take your time and activate them one at a time, each time you start one up you'll have to survive a horde wave, you'll face a tank per generator.

Once you've got them all running you'll have to wait for the bridge to move down, once you can get onto it have everyone fall back to the bridge, have one person run up the ladder and activate the switch up there as seen in the video (it doesn't have to be Bill). From there have Bill jump off as soon as possible run over to the nearest generator as it's the one which goes down and start it back, this is obviously easier if you managed to pick up some pipe bombs to distract the infected!

Once Bill has sacrificed himself the achievement will unlock, if you're playing online and have done as I suggested, it will unlock for everyone.

*^{Credit to tlgrc for the video}

Okay, So This Is In The Sacrifice Which Is $7, all you need to do is play as bill and complete the ending chapter, unlike all chapter endings


SPOILER GODAMN SPOILER DONT LOOK GOD DAMIT!!!!!!!!!!!!!!!!!!!!!!!!

You will need to start all 3 generators and get to the bridge then click the button to lower it, you will try lower it but the generator cuts off then you will need to start it back up again, do it quick because 3 tanks are rushing towards you, once you Sacrifice yourself the campaign will end and you will get the achievement ‘kill bill’ and ‘Supreme Sacrifice’ for 100G.