Benötigt wird Niveus Medieval - SP - v1.0:
http://crysis.4thdimension.info/modules.php?name=Downloads&d_op=viewdownloaddetails&lid=497

"Niveus" Castle is a medieval map, with no storyline or mission, but with a lot of room for exploration.

This map shows the abilities of the CryEngine2.

Installation guide:
1. Go to your Crysis game folder -> Electronic Arts -> Crytek -> Crysis -> Game -> Levels.
2. Eventually backup existing levels with the same name.
3. Copy the level folder from the downloaded file into the current game folder (Game/Levels).
4. Copy the objects folder from the downloaded file into the current game folder (Game/Objects).
5. Start Crysis
6. Open console and type in "con_restricted 0" (without "") to allow access to console commands
7. Load your custom map by typing in "map mapname" (Without "") and press Enter.