Yeah, you should just get it before getting the DLC.

I'm getting Mothership Zeta tomorrow. :v

*HIGHLITE FOR SPOILER DOWN*
In the weapons roomnext to the shooting range look around for the Devastator or soemthing like that it'sthe alien disengator , but automatic and has about 20 more power . After you got to the death ray hub you can't get it sooo...
*HIGHLITE UP FOR SPOILER*

personally never played the game :/
Is it worth it ?

I would say it's worth it. I get around 18 hours of good gameplay on the highest difficulty before retireing that account/player to make a new one. In total for around 65$(?) I've played around 60 hours or so with only the Mothership Zeta expansion. But then again that me :P

Kk a usually play Cod wen it comes to first person shooters but it does get a bit boring, wt does it offer differently do you know ?

Haha it offers free roaming explosive weapons a long story line 5 dlcs mutants ghouls sooooo much stuff

The grunge effect puts me off occasionally.