Rebel Strike Force is a mod changing the regular HL2DM setup into a more on teamplay based game. A player can choose from 8 different classes to fill in a certain role in his team. There currently is only one gametype called "Objective". The idea is that you and your team mates try to complete a given mission while the other team tries to prevent that from happening.
Displayed here are several screenshots of the loadout screen, showing some of our classes.
Just one comment that you may want to take into consideration: there was only one Zero Point Energy Field Manipulator seen, and it was on the Rebel's side used by Freeman.
I agree with this. Perhaps you could give the Combine some sort of a reverse-engineered knockoff, or go with something else entirely.
Right, maybe something more combine-'esk'. I picture something that looks like a large black claw that shoots electricity at objects and then a tractor beam brings it back and holds it. I know that sounds like the Gravity gun but you would only see the claw part, the electricity would be blue, and the sounds would most likely be different. Hope that makes sense, lol.
Or you could base something off of the weapon disarming field in the citadel, perhaps a small hand held glove shaped tool.
You know, the cliché "gravity manipulative device in the middle of the glove" weapon. Just weaker than the gravity gun, as in, it can't pull or shoot as far. To balance things out.
The picture looks like it was done in garry's mod :/