In Starcraft 2, rushing involves skipping out on building up your base and instead "rushing" straight for a particular unit. In this article, I will discuss the best Starcraft 2 rushes for each race.
Best Starcraft 2 Rushes for Terran
Reaper Rush: This strategy involves building Reapers as fast as possible. By following this strategy, you can build Reapers with just 7 SCVs. Have all of your SCVs harvest minerals and send one SCV to your enemy's base. Once at your enemy's base, start building a Barracks on the outside.
While the Barracks is building, build a Refinery and start harvesting vespene gas. Build a Tech Lab on your Barracks and start pumping out Reapers. Send your Reaper in as soon as it is ready and try to kill as many harvesters as you can while avoiding the enemy's ground units.
Banshee rush: This strategy involves racing for Banshees and taking out the enemy before he is able to get any anti-air units. This only works versus Zerg players. You will want to build a Refinery, Barracks, Factory, and Starport at a 10/11 supply count. As soon as your Starport is done, build a Tech Lab on it and then build a Supply Depot. Start producing Banshees right away and send your Banshee in. Kill Queens first then go for the Drones.
Best Starcraft 2 Rushes for Protoss
Void Ray Rush: This Protoss strategy involves building a few Void rays as quickly as possible. Void Rays are expensive, so you cannot sacrifice your economy to perform this rush. Get a Pylon at 8/10 supplies and then get a Gateway at 12/19 supplies. While your Gateway is building, build an Assimilator and keep making Probes. As soon as your Gateway finishes, build a Cybernetics Core and a second Assimilator.
Never stop building Probes until you reach the cap of 22 Probes at your main base. As soon as your Cybernetics Core finishes, build a Stargate. When your Stargate is done, start using Chrono Boost to make Void Rays. Be sure to use extra minerals to build Zealots in order to defend your base from a potential rush. Attack the enemy with your air units once you get 3 Void Rays. Be sure to let the Void Rays charge up off a random building before engaging the enemy's army. Do not go straight for the enemy's units with uncharged Void Rays.
Best Starcraft 2 Rushes for Zerg
Zergling Rush: This is a cornerstone Zerg strategy. I recommend building a Spawning Pool at 9 or 10 supplies (9 at small maps, 10 at large ones). While the Spawning Pool is building, grab an Extractor and another Overlord. Build 6 Zerglings as soon as your Spawning Pool finishes and send them in. Be sure to keep building Zerglings and train Metabolic Boost (Zergling speed upgrade) as soon as you can.
Mutalisk Rush: I prefer to use this rush to follow up a Zergling rush. Start off with the Zergling rush mentioned above. Your enemy's progress will be slowed down by your initial Zerglings, making him susceptible to an early attack by air units. Your Zergling rush probably will not kill the enemy, but you should be able to slow his progress a lot and force him to build anti-ground units. At this point, tech for a Lair and keep building Zerglings.
Once your Lair is done, add a Spire. Continually produce Zerglings and keep sending them into the enemy's base in small groups. These will slow down your enemy significantly. As soon as your Spire is done, build 3 Mutalisks and send those in right for the enemy's mineral line. If you did this right, your enemy should not have any anti-air units and it should be an easy win from there.