I'm glad to say that the Doomstalker Kickstarter campaign is launched! :)
Monster family is in danger - insidious marine forces are coming! Brave creatures need some money to build powerful defenses and cunning traps to stay against crafty men.
You can be a part of Doomstalker world! Please support us, tell your friends and participate in the discussion. An amazing space marine adventure waits!
Why are some of your levels in UDK and some in Source?
There is no Source here, just and only UDK O_o
Also "First person mode, no mouselook! (like in classic DooM)", Doom had mouse-look you just couldn't use it vertically due the the world not really being 3D.
I'm using the expression from 90-th used to compare Duke Nukem 3D and Doom - mouselook means "free mouselook", and "no mouselook" means "fixed Y-axis view" :) I'll fix it if there will be misunderstanding.