I am so sick of this: every match that I lose to terrain mostly comes from this the combination of MARINE+MARAUDER+M, or the MMM ball with stipack.....i dont stand a chance, banelings cant even get to them, and muta doesnt work, plus speedlings are almost as useless
I never approach a MMM ball. I will harass with Mutas and entrench with mainly roaches, a few hydras and sunkens. It much easier to deal with when they are on the move. Burrowed blings are possible or setting up brood lords behind natural barriers work too.
Engage them early with a quick force, force them to stim... ta-da, you just did 10 damage to each of his units! Then just run away and engage again now that you have the edge. Of course, once medivacs come into play, you just need to get the most out of damage dealing units. Hydralisks are a great pure-dps unit, but since they are fragile you should put roaches up front. Yes, you will likely lose many roaches, but if properly managed, you will do more damage than they will. You also should use banelings, you do not even need burrow to use them well. Engage with your main army and keep your banelings off to the side somewhere. Keeping small bunches of them scattered at the edges or keeping them in an overlord and waiting to drop them can also work. Obviously if you go banelings first you will minimize their potential. Finally, if they are really pushing a marauder-heavy MMM, mutalisks work. They beat the small number of marines (if you can't make enough mutalisks to take out a terran MMM ball that is weak on marines then nothing will help) and then take out the rest of the MMM ball. Plus, having a spire is handy because you can tech to brood lords later on if they start shifting to more marines. All in all, if you find a terran player that invested in a large number of barracks then you can really take advantage of that since it is tough to transition out of. Once you beat it, you are at a strong advantage for a long period of time
burrowed banelings with a couple zergling scouts in front to know they're coming usually does it, but make sure you keep other units besides banelings cuz if they keep on pumping the marines... they can be a pain.
What's the ideal counter for mmm later in the game? Roaches+hydras (or mutas) + infestor, finally ultras+brood lords with air support?
I do banelings + mutas most of the time... banelings will pretty much annihilate most of the MMM and then a couple mutas will clear whats left. If they have thors with their MMM, I usually rely on luck though.
magix box doesnt work if they have too many thors or if the thors are accompanied by marines... no focus fire fails hard!
You said they are getting marines and marauders, not mostly thors. Banelings kill the marines, then mutas do the magic box to kill the few thors and you win.
im rlly sorry, whats the last M?? and for marine maurauder vs zerg, from a terran POV i would suggest you either completely ignore it and go for his mineral line (if the MMM ball is far from your base) or if its lategame get broodlords. the b-lords broodlings mess with the AI of all ground units unless properly controlled. also early muta harrass would cripple your opponents ability to mass up a MMM ball. also note that a main component in the MMM, the maurauder, cant attack air so if you take out the marines you go quite unchecked for a while.