i'm reluctant to be too critical due to its age and influence in the FPS genre but I still get irritated when people tell me levels such as "Assault on the Control Room" are the greatest ever made after I've had to double round and retrace my steps four times as everything looks the same and isn't clearly signposted.

Anyway, these were infinitely surpassed by later entries but this started it all off and the story especially is great. The stakes are there, easy to understand and engaging with a small but memorable cast of characters. Foehammer respond!