Warcraft 2 was one of my favorites and one of the first online games I played. The simplicity is what made it awesome, there were so many workable strategies, and like the other guy said easy to learn hard to master. Cheating ruined competitive play a lot, but I think it survived because most players wanted to hide it so they could have a believable advantage, and by doing so it still made it possible for them to lose. Another great part about the game is that we all had our own period of time where we dominated the best of the best, that elite level of play that was unstoppable.

I tried to code a Warcraft 2 clone with the bugs and balance issues worked out back in the late 90s but never got far enough with it. It still intrigues me from time to time to have this kind of project again now that we have so many programming community tools like GitHub to collaborate with