Achievement Glitch?

[PEEPOPO: ULTIMA GAMER]

After playing for awhile. I can't get the achievements "Sewer Alligator", "Zoo Keeper", and "This is it". I've done the things you need to do to get them, but they wont work. Any help?

[PEEPOPO: ULTIMA GAMER]

Oh, I forgot to add the achievement "Eye For Details" didn't work for me ether even though I found all the peices.

[Skymirrh]

Are you playing updated or original version? Original version's achievements are known to be bugged.

[Mandrake]

I found Sewer Alligator wouldn't unlock for me unless I repeated the mission, went down into the sewers for a second time, then went to car. The other three achievements unlocked following the first kill I made once the required conditions had been met. All of these achievements were unlocked using the most recent version.

[PEEPOPO: ULTIMA GAMER]

Alright. The achievements worked I just didnt see the achevement tab come up. I didnt get Sewer Alligator so i'll try your plan Duck. Thanks for the help everyone.