Salem's general Z guide for new players

Subterranean: Right click entire horde to the western door (if done right the marine who spawns west wont have a chance to close it).

Buy an abberation

Take a few Zs to kill that marauder right by the west door, cuz he slows ur horde.

Take the first west room

Creep tower a little down and right from the weapons locker in the early west room

Keep pushing your horde into the 2nd west room

Creep tower spreads creep into the very back of containment, by the sublevel

Quickly place a sunken on this creep before you lose vision

Burrow the abber, which should have just hatched, onto the creep made by the creep tower

Now, right click the abber onto the hive mind emulator in the back of cont.

Dont stop to attack anything else, your abber will live, dont worry.

Kill it, then back your abber off.

At this point, the freed zerg should have killed most of the room, but there will still be some units left

Your horde should have taken the 2nd west room by now, so use them and the abber which should have healed a bit to take containment

Morph abber into Abom

Free the zombies from the cage in cont, take rich mining, and build an extractor there

Burrow your t2 alpha from cont up onto the edge of creep by east

Suicide every bit of your horde south (press f2, and hit the suicide button ONCE, no more or you'll suicide your flyers)

With spawns, flyers, t2 alpha, and your abom once it hatches, take sec (focus on the siege tank, and use flyers to kill careless marines)

At this point, the game is already won. a few marines are probably dead, you have 2 major rooms and 2 t2 alphas.

Snowball into FDC and O mining, then into gates and E mining. place viros as soon as they can be defended, and you should win before fueling even finishes

Now, sometimes marines will counter this strategy, but they have to know exactly what they're doing! If you see a marine with plasma at the back of cont, back off! Build a lesser nydus on the creep tower's creep, push the front of cont with your horde, and unless a bunch of marines rotate there, you should still take it. If you see too many marines (3-4) in cont, or you clearly cant take it, just rotate. Burrow the abber north, suicide the sunken and lesser, build another abber, and try to take gates (or even sec if you're feeling cheeky) while they are all south; it's a very long rotation. This strat isn't fool proof, and it's a little bit of a hack, but it works 75% of the time, and another 20% marines so badly over rotate that I'm able to take the entire north half of the map with no resistance. Generally, throughout the game, dont get strains. continue spamming t2 alphas (mostly aboms), get all the t1 creep ups (except regen, its bugged, though might be fixed soon), pods, and extractors wherever you can get them.

Arctic:

Starts of similar to sub

Right click horde to east door, take a few Zs to kill the marauder that spawns there, build an abber first thing.

Continue down the east bridge, take the room with the ghost in it. Then, take the long room above sec. Make sure you dont lose any units to the security bots in labs, they love to agro you. Just walk away.

either at the previosu step or the next one, you should have the gas for another alpha, build another abber

Now, burrow your abber, and with your chunk of horde above sec, take sec (remember the three marines in the bottom right of sec, dont forget to kill them)

While attacking sec, build a sunken outside the sec door to kill some units

Now, sec should die, push up to labs, take it, build an extractor, kill the room outside cont, kill cont, release cont monsters from cage.

Take flyers, through the sublevel at back of cont to back of FDC, flyers can solo kill FDC.

Morph one of your abbers into an abom whenever you have gas

Take all your alphas not currently in an egg, and kill north (FDC, fdc mining, NW mining, and power). If at any point here you stop making progress, rotate to kill A.

Once you've taken the big room outside FDC, build a viro there, its very hard to kill

While north is dying, take your abom which at this point you should have at least one, burrow to left edge of sec, and kill A mining with it. Might be denied if marines are watching for it, but at this point it doesn't matter

At this point, if A mining dies, a viro at D is also pretty safe (remember to always defend viros with 1-2 sunkens and a lesser or a gene if you happened to get one from cont)

Make sure to not let marines get too much of an A fortress going, and you should win pretty easily. a creep tower by the small room outside of gates in the little elbow at the back, then a greater in tank room, should kill any notions of an A fortress