Mark has been reading my presently favorite forum. And he also linked to an upgrade to the second greatest game in the history of the Mac OS: Spaceward Ho!

When I was in school, we ran the labs. So we'd just take a key over to FSG after hours, bring some friends, and Ho! for a few hours. There was ethernet. And it was Good.

FWIW, the best game ever for MacOS was Escape Velocity, by our good friends @ Ambrosia Software.