Another in the God is Pfhorever series (with (currently) The Hand of God, The House of God, and QuickSilver). Haven't had a chance to play it yet.

Just what it says. Nice concept, a little hard to get around. Updated to work on all macs (not just PowerMacs).

Four levels, from the maker of Athens Outpost. Be careful-this is not an easy scenario. Well done.

Sort of a demo map (actually comes with some tutorial-type stuff) of interesting special effects. Incorporates the two-level stairs shown in Pfhunky Stairs (found in the Novelty Maps section). A bit hard to get around, at first.