Nyctos is a small (coffee break?) hack-and-slash roguelike revolving around light designed by a linguist and an elder statesman for the 2009 annual Seven Day Roguelike Challenge. The game is written in Python using a roguelike engine named PAROLE. The thread announcing Nyctos' entry into the challenge can be found here:

http://groups.google.com/group/rec.games.roguelike.development/browse_frm/thread/1ba60626178b0085

All entries can be found here:

http://www.roguetemple.com/forums/index.php?topic=343.msg2681#new