I'm not really experienced with grenades..

*Looks at code anyway*

Hmm, yes, I've used that minigeddon grenade, but I wnated a gravity well that would last indefinitly or until something disrupted it.
Originally I wanted to make a gravity gunthat actually lets you lift junk up and hurl it around at will, but I thought someting that could erase everything within a certain radius would be cooler.

Since when could we make gravity guns.

Also, the lack of CC knowledge in this thread is amusing.

Deathvac + all gravity guns =
negative mass particles
win at pulling, fail hard at actual, y'know, particle launching.

Hey, I'm new here, so dont give crap 'bout that, ya dig?

Anywho, this is a physics based game, so there has to be SOMEWAY to actually manipulate the actual gravity code instead of using neg particles. I doubt HL2 uses negs for their grav gun, do they?

There is none.

Honestly, while your ideas are unique, they're almost all impossible.

Every CC mod that can be made well, HAS been made. Well.

Build Eighteen is modded out.

Hmm, I suppose without the actual source code for the games engine making a REAL gravity manipulation device would be impossible...

Well, maybe in a later build or the final version Data will have given us full scripting engine access, or at least added his own gravity manipulators.