Today we take a short break from our normal broadcasting to talk about a bit of gaming strategy.
In Starcraft 2 a "proxy" means you fore-go building in your own base and instead build your unit producing structures nearly on top of the opposing player. Timing is everything when using a proxy, so it is best used in maps where you know the starting location of your opponent(s). The following proxy build order is something I have been perfecting since the game was in beta and with the right amount of micromanagement I have found it rarely looses.
If you have never read a Starcraft build order before, the number before each listing is the number of SVCs you should have before building each object. In this particular build order the item listed in bold should be constructed in your starting base.
8 - Barracks
10 - Supply Depot
10 - Marine
10 - Barracks
10 - Marine
10 - Marine
12 - Bunker
The two key elements to any successful proxy are speed and micromanagement. As soon as the game starts, select five of your six starting SCVs and have them get to mining - the sixth SCV (your builder) should begin making his way to just outside the enemy's base. At the same time while all this is going on, get your first two additional SVCs building at the command center.
Most maps are large enough that by the time your builder SCV is outside the enemy's base you should have 150 minerals to get your first barracks building (if not wait a few moments). While that is building you should have time to build two more SCVs, followed up by a supply depot back in your home base.
As soon as your barracks finishes it should start producing marines - all of your barracks should be constantly producing marines until the match is over (which in a perfect world will be just a few more minutes). Now you have to wait around a few moments to gather resources, your first marine should finish and you should get your second training. Sometime between your first and second marine you should now have enough minerals to get your builder started on a second barracks. While he works on that make sure your first barracks continues to pump out marines and to ensure a steady cash flow once you get into combat you will want to produce two more SCVs as soon as you have the funds.
With 12 miners going you should have enough minerals to get a flow of marines building at your second barracks and throw down a bunker just outside their ramp. Right about the time you get your fifth marine your bunker should be finishing up - this is where the micromanagement begins. Take your group of five marines and attack forward into their base. If you meet heavy resistance, attack and then fall back to your bunker - if your opponent is a poor player (or not paying attention) you can bunker your marines and easily kill off their units.
That is the core of the build and typically enough to throw most people off their game. The key in winning the game from this point forward is to keep almost constant pressure on the other player by attacking with your continuous flow of marines. In terms of expanding more, you should have more money than just two barracks can drain, I typically construct a second supply depot at my starting base, a few extra SCVs, and then a third (and possibly a fourth) barracks at my proxy.
If you are having an issue with pushing all the way into the opponent's base right away, I've found constructing a second bunker at the top of their ramp you can retreat to does wonders. Also important to remember is that if you kill off all of a player's offensive units gun it for their mining line before destroying their buildings. A decent player will most times order their miners to attack what is left of your marines - do not let them surround your squad. Micro back and forth (lure them all the way back to your bunker if you can) dealing what damage you can to their miners in the mean time.
That is the jist of it - pour your stream of marines into their base until they quit or are wiped out. Give it a try and let me know how it works out for you - if you find something that works slightly better, let me know! I am always looking to improve my game :)