Despite some of the flaws present which drag it down, Calamity is still worth checking out for the enjoyable first half and offers a good design approach to an industrial district straying from the typical City 17 style.
Browsing tag: HL2 Theme: Industrial
One of the best map series for Half Life 2, really recommend you play this one.
A decent map, with really well controlled action and solid design.
The setup is simple but the map is enjoyable from the get go, with moody underground segments and solid mapping all round.