My Biilibili:  https://space.bilibili.com/1296690575
This is the third map I have made, and it is also the finest map I have ever made. It took 4 days in total. The playability is very high and the difficulty is average. First of all, thanks to @ucername7. Without him, my map can't even be compiled, and many bugs are fixed by him.
Background: You are George Black, another scientist at the base in Montenegro, and you have access to H.E.V You and other scientists risked their lives to escape here, but you drove to the base occupied by HECU by mistake. The car has been scrapped, you have no way out, only a pistol, fight our way out!