I downloaded the 'full' big escape and dropped the fpm into the latest GG, now granted the visuals weren't briliant as GG by default is expecting PBR models but the game play was way better that I remember it.
It is actually a lot better now AI wise and not having a radar is actually an improvement imo.
The only downside are the RPG guys, with the latest GG they fire 3 RPGs at once!
This really needs to be resurrected as a demo level for GG with the visuals sorted.
Been there, done that, got all the T-Shirts!