Chieftain Boom/Rush
1. build 1 supply pad, a temple then another supply pad.
2. send chopper to get crates.
3. Send Chieftain to get crates, but make sure hes on his way to the enemy base, put him just outside the enemy base (so they cant see him, or accidentally get seen by a hog or ghost). Upgrade supply pads.
4. build another supply pad and a hall, upgrade all supply pads before getting any units out.
5. train some brutes, hunters and jackals depending on what they have and put them in the teleporter to your leader.
6. attack, but be smart and don't just go for the main structure, take out unit-training buildings first and reactors.
7. Keep spamming out units into the teleporter.
This is hard to defeat on 1v1, but on 3v3 make sure you have back up if all three of the enemy counter rush you.