Labyrinth
A simple scenario to keep you entertained (or frustrated) for a few hours. You have to find the way out with whatever units you manage to find/keep alive
Spoiler Alert: Reviewing the map in the editor prior to playing can help you find the right path and spoil the fun.
Hints: Some doodads are for hints. Beware of those hydras on high ground. These zerg are not the smartest of all creatures - use it to your advantage.
Well, you can always use the editor to find the hidden units and DO NOT fight those lings with the hellion, just hit and run. Ultralisks run away from sieged tanks if the shot comes from far enough
I found it too difficult, so I threw a hero Mothership in there. xD