Now about Lambda Wars. I think it is one of the best mods I have ever seen, it is so good it could easily be a great stand-alone game. Just a few problems are knocking at the back of my skull though. First of all, the cover mechanic. I love the concept, and games like Company of Heroes and War-hammer 40K did it well, but that was because those games were squad based. Lambda wars goes for the more traditional unit based system. This, in coalition with the cover mechanic can break some things, and to be blunt about it, doesn't work. A squad-based system would also be a bit more grand, as yes, in the Half-Life lore there were not many rebels, and in the game one could hold their own against 4 metropoilce and 2 soldiers. Squads for both factions would make a bit more sense. Maybe the partisan/refugee could be five men big, and a normal rebel squad four men big.
The next big problem is also for the rebels. Now in the Half-Life lore, rebels had experience, the combine had numbers and technology. The combine usually conscripted their soldiers and only gave them basic training. As mentioned above, a hardened rebel could hold their own against 4 metropoilce, and even 2 or 3 soldiers (who are supposed to be highly trained and heavily armed). Though even with the unbeaten skill with the rebels, numbers and technology could easily outdo that. This is why, in my opinion, the rebel base should be mobile. The combine would usually stay in one place, at the citadel, and maybe make a few forward bases here and there. The rebels did have a central base:
:but they kept it a heavy secret. The rebels used guerrilla tactics, meaning they moved and (tried) to never gave their positions away. They always moved their bases from building to building, because if they stayed in one spot, the combine would surround them. If the combine are as skilled at building flying maggots with lasers and other s*** strapped to them, a decent commander would never let the rebels out of their sight. This is why the rebels had to camouflage everything, and make what they did have seem abandoned and broken. In-game, I think the rebels could be able to use buildings as their base, or set up their own somewhere, but the biggest point is that it has to be hidden.
In a few words, the combine should have a stationary base with cheap and decently skilled and equipped units, while the rebels should have a hidden, moving base with expensive, lightly armed, highly skilled units.
If the change to a squad based system is considered, just know that it could also make the game easier to develop as well.
Well, if you read this, thank you! Have a noice day/night!