I dug up something ultimately rare! It pretends to be the rarest expansion pack for vanilla StarCraft that released on 1998. I couldn't find any information about publisher.
"In search of dominance of the galaxies the three species: Terran, Protoss and Zerg challenge you once again in 1000 thrilling new deadly game levels and missions.
This is a very rare expansion set for Starcraft & Broodwar. It contains 3 new campaigns. It includes 100 Internet Links to StarCraft sites, Maps, Missions, Editors, Utilities, Sounds, Strategies, Newsgroups. Single player and multiplayer options (up to 8 players). Face-to-face combat, allied or team play over a network or via the Internet".
- 3 campaigns that contain 20 missions.
- 1000 melee maps.
Feedback if link is broken.