This mod lets you have achievements on your PC version of GTA:SA

maybe its not as good as those of the xbox 360, but its the same concept. Complete missions, sub-missions, kill people etc
Your prizes for completing achievements vary from, cash, guns to cars.
I may make one for vice city too! 
Please contact me if you have any problem with the mod.

Too look at the achievements you can attempt just read "San andreas achievements list.txt" it has all the information on the achievements.

Most people are put of by the fact that a mod has a .exe that installs it, but i honestly assure you this .exe is genuine and the fact i chose it is because it saves you the hassle of moving lots of .cs files etc, also its alot quicker you can install this mod in seconds. it also comes with an uninstall feature which removes all the files added by the setup  hope you enjoy!