NS2Combat’s aims are to reproduce the design of the original NS1 Combat Mode:
Players get experience (score) for killing enemies or being around their teammates who are killing enemies. You can level up ten times in a game, getting an upgrade point to spend each time. This buys you weapons, evolves and upgrades. You can specialise as any of the Alien lifeforms and as a Marine can choose to go Jetpack, Exo or some kind of ninja engineer.
We’ll keep the mod server-side until client-side mod downloading support is working in Steam Workshop. The most important thing is that you shouldn’t have to install anything to get the mod working as a player, and server operators should only have to do the minimum amount of updating (if any) to keep the game working.