Galaxy is a play-by-email game with fairly simple rules,
but complex strategy and very involved planning. You start on
a planet that has exactly the same resources and population
as other players' "home planets".
You then build ships to colonize and develop nearby planets,
produce mobile and stationary defenses and attack ships. You
conduct diplomacy by e-mail with your neighbors (or let your
actions do the talking), form alliances, non-aggression pacts,
co-prosperity spheres, and whatever else you can think of.
See the rules for details.
Also see
some tips and tricks for playing Galaxy.
Depending on the game, turns are run somewhere between once a day and once a week (keep in mind the last game I ran lasted over 70 turns). Email me if you would like to join in any future games.
Here's the stats for the current game running.