Astronaut Spacewalk by Jorge Hernandez is the closest most of us will ever get to taking a no-tether trot in outer space. The delightfully complex and detailed simulation game gives you a screen filled with controls and a few simple missions to complete, then sits back and watches while you climb the impossibly high learning curve. It will take hours, not minutes, to learn how to maneuver your lone astronaut, and until you do, you'll probably feel confusion, bewilderment, and possibly a touch of anger. If you stick with it, though, you'll discover a game that shares the joys and wonders of space exploration tempered by the realism of science, and it's a wonderful experience indeed.