Thread:Vorknkx/@comment-3547390-20150418114653/@comment-3547390-20150428063942

So this is the Jet that inspired Half Life, wow. Made 2 years before Half Life came out...

The Standalone levels are a whole slew of mixed together levels. You are right though, there are plenty of map design demos. There is even a readme on creating a Gondola and a Electric Pylon (Cthon's Crusher according to the readme).