A friend of mine found this game the day before it was released. I donwnloaded it tonight and can't stop playing.
Curse is a totally physics based HL2 Mod. It features puzzles and maps full of secrets. Your main weapon is your hand which functions like the gravity gun. Right Clicking gets out the phycic mace which you can swing at enemies(enemies are remodeled HL2 enemies the ai and behaviour is the same the sounds and looks are not).
Here is a video:
http://www.moddb.com/mods/curse1/videos/curse-gameplay ( i tried to embed this but gah)
and the link:
http://www.curseepisodes.com/
I'd download if their link wasn't to fileplanet
where you have to sign up for an account (possibly paid) just to download a mod.
There will be alternate mirrors soon.
Reminds me of the Egyptian level on Sonic's magical homo adventure (or a similarly titled failgame) mixed with Morrowind.