If you need help with qoth, I can assist you there.
It's all map effects, there is actually very little supporting code. Prototypes were done before the game mode code was even started
![:rolleyes:](https://forums.duke4.net/public/style_emoticons/default/tongue.gif)
... Actually QOTH is even optional, you can use map effects to create pseud-gamemode maps as the logic allows you to create rudimentary state machines, i.e. kill 10 guys and door opens and more spawn once you reach a new trigger. You could even create a sort of time-crisis/arenafight like scenario (where you can move freely) where you fight room by room and get some supplies and cool shit.
I wouldn't worry too much about comparisons, the texture set is quite flexible that allows very different styles to be done without too much trouble, go for something unique!