Starcraft – How to unload a single unit from warp prism/medivac without mouse actions

I managed to do it with just Marines, Medics, Marauders and Siege Tanks. I put up two bunkers and four tanks at each ramp for defense, then built up my forces for the assault. I attacked the base directly to the north. The initial tactic is to place tanks in siege mode a little bit back from the protoss ramp so they are out of range of photon cannons. Then run your MMM ball halfway up the ramp so the tanks can start shooting down the cannons. Meanwhile keep the drill hotkeyed so that it can assist in taking down archons, collossi, void rays, and anything that's doing damage. Don't let your MMM ball run out of reach of your tanks.

When you've beaten back their initial defensive line you've got a foothold. Move your tanks up and keep on pressing in. Focus on taking down the pylons around unit producing buildings and keep your drill handy to zap the occasional pylon or counter-attacking heavy unit.

The real key to this strategy is you need to keep reinforcing. Keep your barracks and factory hotkeyed and move the rally point to deliver troops near the front as you move from left to right across the map. Before you've taken out the entire northern base you should have the achievement. Good luck!

• Most of the advice to stop Nydus worms applies in general. First of all, you should be keeping an eye on your base no matter which race you are facing, and regardless of whether or not you have scouted a Nydus Network in the Zerg's base. All races have ways of getting units into the back of your base without going up the ramp. Medivacs, proxy pylons, overlords with ventral sacs, warp prisms, blink stalkers, colossi, reapers, etc, not to mention pretty much any air unit.

• Denying vision to the zerg player by harassing overlords should be done in general, not just to stop worms.

• To help detect the nydus worm (and all other threats mentioned in previous bullet), spread buildings out in your base, so you have vision everywhere. Terrans can spread supply depots, protoss have pylons, and zerg have creep tumours, or overlords to spread around.

• Learn the sound a nydus worm makes when it completes. Sadly for us zerg players, the nydus worm announces itself to all players with a loud scream, similar to how everyone hears "nuke launch detected". On the plus side (for us), it only screams as it is finishing. This won't help you stop the worm, but it will alert you that you should be looking for the worm to make sure it's not in your base, or if it is, mobilize some troops to defend.

• In team games, consider using the team colors option for the minimap, so your units are green and your opponents are red. This will make the nydus worm stand out in your minimap more than if you are orange and your opponent is yellow, or some other combo of similar colors.

• Worms don't have a lot of HP, even when they complete. When they are building, a handful of units can kill it before it completes. I just did a quick test; 3 marines starting to shoot as soon as the worm reaches 50% done can kill it just after it finishes, enough time for only a few units to get out.

• Remember that each worm costs the zerg player 100 minerals and 100 precious gas. Each time you kill one before it completes, the zerg is behind on resources. They can also only be building one at a time. (specifically, one per Nydus Network)