This is my favourite map in Peril (map2). It serves as the skill select area.
It features HMS Forward (the tunnel complex), which was a real radio base used during WW2 by the Navy Wrens.
I used to go down there as a teenager 1994 and 1995, and it scared the hell out of me. I always wanted to recreate the place in a game.
After the war the base was abandoned, and now it’s entrances are all blocked off. The radio equipment and servers were obviously not there during WW2, but I wanted to make it feel real, so the idea is that the base never shut down.
When I play this it sends a shiver down my spine, as those dark empty corridors are still there right now.
If you check out HMS Forward on YouTube you can see what the real place looks like now.