i really liked this map i play on normal. got a little confused after i hit the 'yellow' button & fell in the water. well interconnected i thought. great architecture in many places.

Yes, this is a lot of fun -- a map I'd never played before, but may well return to, despite some occasionally confusing geography. It's very strange how you never actually use either of the keys: the moment you pick them up, their doors open of their own accord. It's rather unsatisfying to go back and find the doors just standing open.

Some of the combat set-pieces are very hard, especially when you have to emerge from water into a small room with a shambler and some henchmen: it's hard to imagine how I'd get through that on Nightmare, Hard was enough for me!

I missed all three secrets -- anyone know where they are? Perhaps for this reason I finished with only 132 of 151 kills.

In the starform outside area with the central teleporter are two waterfalls. Walking on the top of the boundary, from the big cornerdoor to the green armour, you can jump down to a side ledge. Halfway the height one side leads to a ammu-chamber with a enforcer, the other side to the outlead of the waterfall. That's the entrence to the first secret.

In that same area is an ogre pit, that is entered on the bottom with a water corridor. On top are two ogres and there is an escape route leading back through a waterpipe to the middle of the cave. Just before that pipe the wall is shootable. That's the second secret.

I discovered it is rather hard to end the level without this waypath, as it is rather dark and the small block underwater cave is bad lighted. Under the second arrow there is only a small amount of space to shoot away the bar that leads back to the center of the cave.