SC SUM is a Mod based on StarCraft Broodwar 1.16.1 that preserves the classic StarCraft gameplay with all its original units, upgrades and abilities but enhances the tech tree by three new unique super units, corresponding new research facilities and lots of new upgrades and abilities. In detail: 3 new super units, 1 new support unit, 3 new buildings, 15 new abilities and 3 new upgrades.
This is the latest (and most likely final) version 1.45 of SC SUM that is almost identical the previous version just with all server related features removed.
The SC SUM server and the official SC SUM homepage will be going down soon. As I do not use the server on my own anymore and it is barely used at all, I cannot justify the ten bugs per month in the future.