this my first quake 2 mod!
its name is The Challenge and it tells you everything. there are many changed things, such as:
-the monsters' health, damage and eventually attack speed are modified
-they are a bit smarter (in example, the tank uses the rocket launcher if you are close to it, and blaster if you are away from him)
-your starting health and maximum health are lowered!
-the armors' effects are better (in example, the body armor protects you from 90% of the bullet damage)
-and many more! (in example, the parasite drains your health like a vampir!)
if you'd like to play it, you must do the following steps:
1) get the mod from this link:
http://www.megaupload.com/?d=TYORFX312) unarhive(unzip) it to your quake 2 folder
3) open quake 2, and write in console the following thing:
set game thechallenge4) start playing quake 2 as usually (open the main menu, new game, select a difficulty or load a game, etc..)
P.S.: i'm not sure if anybody will anytime finish quake 2 in this mod!