I started making JigWars:Source based upon JigWars.
tough, its gonna take a long time without a team, i will look how the ways go.
Major Things.
NPC's
Tilt when walking/running
Rebel skin (hands)
CS:S, HL2

eta, DoD and HL2 weapons
New HUD.
Minor Things.
Mapping
New scripts
New Storyline
Well, that was it

UPDATE: testing Alpha Engine on Gmod, wich works pretty well