A small map I decided to make to receive all weapon and hostage achievements in a fair amount of time.

YouTube Video: http://www.youtube.com/watch?v=chaatSp2qq4
To start the achievement hunting you simply type the following two commands into your console:

mp_autoteambalance 0
mp_limitteams 20

-> And you are good to go :)

This is my very first map I built using the Hammer Editor, please keep that in mind when you find any flaws or mistakes :)

Have fun!

TrilluXe