The final version of Ancient Aliens has been released. You can find it here in the /Idgames archive. I’ve made a ton of changes to map24 for the final release (including a rework of the imp ambush near the red skull that won’t have you tearing hair out, and a large new secret.)
The Ancient Aliens texture pack has also been released and can be found here. My map24 additions can be found under the _Kassman marker.