This is a large military base located on a hostile alien planet, powered by an included altered Rubicon mod
(Mod included inside the PAK file)
Greenwood's description:
"This was the first map for a Nehahra episode that never materialized.
It's a neat Base map, with underground missile silos and conveyor belts.
Bal started this around 2005 & I thought it shouldn't remain dormant.
"Author: @Bal & @Greenwood
Year: 2021