Invasion style levels

[baronofheck82]

Are there any really good invasion style levels for ZDoom? I ask because I'm a huge fan of slaughter maps, and invasion maps turn into slaughter maps after a few rounds.

[gggmork]

I made this in 2010:

http://www.sendspace.com/file/9lsit3

gameplay only so just 1 texture I think.
Choose from (4?) goals, winning by killing a certain number of a certain type of monster etc.

[Tango]

if you are ok with using Zandronum, I made these a while back:

http://zandronum.com/forum/archive/index.php?thread-733.html

[Sqrrt121]

Combat Shock 2? Its on the cacowards or the 100 best wads of all time.