A viable and easy to execute fast expand option for all match ups.
Command Center first allows huge Mineral intake, allowing you to take full advantage of Marine production.
Be sure to block of your ramp to prevent harassment, early pressure, and scouting. If the opponent notices you are fast expanding, you should expect some retaliation.
This works best on small maps where Marines can defend the expansion easily.
Submitted by: Xerosigma
Credit: Nestor E. Ledon