After playing with Starcraft, I installed the expansiot set Starcraft Broodwar. It adds exciting new campaign missions, and the new units are worth the try. I've deeply enjoyed and appreciated the original game of StarCraft, and I'm enjoying the game even more with this expansion set.
The campaign story line is also very exciting, as I've learned more about the Protos, Zerg, and Terran races. I get to control new heroes, and some of them were previously from other races but were converted to serve the other races.
This is a very interesting game, the new additions are very much worth it. It runs on even old computers, as Starcraft Broodwar only requires Pentium 1 machine with 32 MB of RAM, and I really appreciate the low requirements. Despite needing so little system resources, the graphics are still pretty neat even for our current times, and this game is still being played in international contests.
Buy this! It's worth the price!