Counter-Strike xtreme adds way more characters and weapons... Plus zombie mode and ghost mode ((: it completely changes the counter-strike experience... Enjoy!
What i can say if if this wasnt a blatant ripoff of Counter Strike Offline NST Refresh Edition i would have liked it.
Unfortunatelly is a rippoff of another mod,it have some of the files of the mod in the install folder what a dissapointment.
And the worst thing is that they didnt bother to hide it,while CSO NST has everything made by themselves and have ported everything from counter strike online (is the best one because is like playing counter strike online even have the maps) this guys to not be noted just deleted the maps and used the default ones of any counter strike install.
The good thing is that you can always fin CSO NST Refresh somewhere.