Here's something completely free: http://lgdb.org/game/chaosesque-anthology
It has both medeval and tech maps. (Q3 map format) There are over 100 maps. I made 1/2 of them. Enjoy. http://sourceforge.net/projects/chaosesqueanthology/ You can use mutators to add monsters (create>mutators in the menus)If you DL the GPL Quake Retexturing Project and put in in your data dir, you can play Q1 maps too.
