According to the accounts of many happy Mac gamers, last week's launch of Steam on the Mac has been a huge success. Those of us on the Steam team were especially pleased to be able to include Portal as a free download to celebrate the launch, and it appears that many of you agree it was a good idea - there have been approximately 1.5 million downloads so far. Aperture Science, we've heard, is... more.

Simplz: Zoo combines two types of game play, simulation and puzzle into one unique game. In Simplz: Zoo, you'll be in charge of your own zoo.  You'll decide everything from what animals to add, to where the water fountains should go. Play is broken into two parts.  In the simulation part... more.