A couple years ago I made this to try recreating the nostalgia of playing CoD1 1v1 with my friend on a LAN cable. We'd spend a ton of time just sneaking and sniping, and I feel like this helps capture that feeling pretty well.
There's a bunch of custom scripting and it's been thoroughly tested by me and a couple friends here and there. There's a ton of sniper themed equipment and support options including a personal heli transport pilot, limited artillery strikes, location and camping hints, supply drops, and more.
And everything is highly customizable via mission parameters, from view distance, to scopes, weather, and support options.
https://steamcommunity.com/sharedfiles/filedetails/?id=2847352412