all alone achievement question

So I was playing some Infection/Living Dead yesterday over LIVE and I was Last Man Standing twice in an Alpha Zombies game on Sword Base, and to my dismay I didn’t hear that classic beep boop which would’ve of signified that I had gotten the All Alone achievement, (Defiant: Was the last surviving uninfected player in a matchmade Infection game.). SO all I’m asking is how I can earn this achievement. Does it have to be on a Defiant/any other DLC map?

Yes, unfortunately this achievement can only be unlocked on Condemned.

You need to be very lucky to get this map in Living Dead. I recommend to play with a full party or you will most likely not be able to get this achievement.

Ahhh ok man thanks for letting me know!