Hopefully this can be a central hub for all things Terran. Recently i had 12 or so roaches get into my base and i wasn't sure how, i don't think they wormholed, but they did pop up from a burrow, is there anyway to prevent this? Would a sensor array help? Also are bunkers the only form of ground defensive structures terran have?

It certainly helps to have some form of detector, and you'll want the Orbital station for other reasons too. Using it for MULEs early in the game gives you a significant econ boost.  
 
Regarding defenses, Bunkers are the only structure that's sole purpose is pew pewing at ground units.  That being said, however, Command Centers are capable of turning into a powerful turret if need be and a siege mode siege tank is your best friend while defending.  Splash damage + mobility in a pinch = a sound plan.
 
Your roach problem can probably best be solved with good scouting.  If you see the enemy making roaches at their base before they're burrowed, you know what to prepare for and generally have enough time to do it.
 
Just make sure you don't make the mistake of getting too defensive as Terran.  Obviously, they're the best turtles in the game, but without a good offense, they WILL break you eventually.  The trick is balancing defense with mobbing with teammates, or pestering enemy workers in the backdoor with some cloaked units or marines/medvacs.

I've found that it's almost always essential to wall myself in and be defensive initially while playing as the Terran (unless I'm playing against another Terran player) to avoid any potential Zerg/Protoss rush. Eventually you'll probably want to setup some siege tanks to beef up your defense.
 
As far as offense, I'll generally build two barracks early (one with a reactor and the other with a tech lab) and start pumping out marines and marauders. Then, I'll start working toward cloaked reapers and/or medivacs and stimpack. Cloaked repears work well to harass anyone early on, but I've found that they can be devastating against Zerg. Dropping a couple of medivacs filled with stimpacked marines and marauders serves about the same purpose. While I'm doing that, I begin building more medivacs, marines, and marauders along with some heavy weapons like Thors and siege tanks. I also like to build at least one or two ravens just to cover my ass against cloaked enemies (the orbital station's scanning ability works well in a pinch if you notice you're getting attacked by something invisible, but I prefer to use that energy on MULEs).

" Hopefully this can be a central hub for all things Terran. Recently i had 12 or so roaches get into my base and i wasn't sure how, i don't think they wormholed, but they did pop up from a burrow, is there anyway to prevent this? Would a sensor array help? Also are bunkers the only form of ground defensive structures terran have? "

I figured I'd go a little more indepth with my misadventures with Terran in a blog post.  
 
And @StarvingGamer, I literally had no idea they did that. But, I've also not ever played Zerg so that's great to know!

Detector is key early in the game. It's a lot safer than sending an SCV over to the other dudes base and gives you a better look and what he's doing. That's basically all the Terran strategy I have developed so far, other than make a bunch of dudes.

" @The_Drizzle said:

" Hopefully this can be a central hub for all things Terran. Recently i had 12 or so roaches get into my base and i wasn't sure how, i don't think they wormholed, but they did pop up from a burrow, is there anyway to prevent this? Would a sensor array help? Also are bunkers the only form of ground defensive structures terran have? " 

Roaches have an upgrade that allows them to move while burrowed.  However, if you've blocked off your ramp then they won't be able to enter your base, burrowed or not.

 "Your roach problem can probably best be solved with good scouting.  marines/medvacs. " 

everyone should check out Husky on youtube.  He has some fantastic strats for Terran

"Recently i had 12 or so roaches get into my base and i wasn't sure how, i don't think they wormholed, but they did pop up from a burrow, is there anyway to prevent this? Would a sensor array help? Also are bunkers the only form of ground defensive structures terran have? "

It's all about the rippin' and the Terran.  The rippin' and the Terran!   
  

Speaking more to general strategy, I tend to go for a fast factory walloff vs Zerg into Hellions to A) Harass B) Scout
 
If it looks like the enemy is going Roach/Ling, Hydra/Ling, Hydra/Roach then I'll typically go for an MMM ball with Tanks.  If it looks like Muta/Ling then I'll go for Hellion/Thor instead.

Always get Orbital Command. ALWAYS. No matter what. If you are in the situation that you actually need the PF turret in your base, then you're dead already (huge genralization there, but whatever its true) 
 
The econ boost from MULE's is just too good to pass up. No matter what.

This is why I always harass as much as I can when going against a Zerg player. Make some Helions or Reapers early and go kill some drones. And if you see that he threw down an early roach warren, than you can build marauders and or banshees to counter. I really like going banshees a lot against zerg, research the cloak and you cause massive damage and a lot of times, end the game early by crippling his economy/sniping queens.

...I think my game is glitched.  I did that Marine Rush Build achievement twice and didn't get it.  I used a stopwatch the second time too...you guys unlock that achievement? 
 
Trying to figure out what's going wrong.  I got the Zerg and Protoss one like cake.

" Detector is key early in the game. It's a lot safer than sending an SCV over to the other dudes base and gives you a better look and what he's doing. That's basically all the Terran strategy I have developed so far, other than make a bunch of dudes. "

" @HandsomeDevil said:

" Detector is key early in the game. It's a lot safer than sending an SCV over to the other dudes base and gives you a better look and what he's doing. That's basically all the Terran strategy I have developed so far, other than make a bunch of dudes. "

What?  You send an SCV over to the opponents base as you get a better look at what they're doing early game, they shouldn't have any units except workers at that point

Spam tier one, reach gold league.

I have a hard time playing a very defensive strategy while micromanaging my scout and building a great offensive push at the same time.  Thanks for the link to the Husky video's on Youtube, I played the first StarCraft but only very limited online gameplay time and I've been practicing in skirmishes against the CPU.

Terran Mech, FTW!

I've found that a mix of hellions and marauders can be pretty devastating against a Tier One/early 2 Zerg force, even some Terran forces if you get them early before they start viking spamming. 
 
Any thoughts on how to go after Protoss?  I often feel completely vulnerable to them, while simultaneously unable to crack their d.

i generally proxy rush terrans and protos with reapers, against zerg i i wall in and tech to Helions and later Banshee if my opponent lacks AA. Works pretty well, at least until you get to dimond level, then you have to start getting a bit more advanced.

" I've found that a mix of hellions and marauders can be pretty devastating against a Tier One/early 2 Zerg force, even some Terran forces if you get them early before they start viking spamming.  Any thoughts on how to go after Protoss?  I often feel completely vulnerable to them, while simultaneously unable to crack their d. "

About 20% of all Terran players seem to turtle in with siege tanks in silver league from my experience. You are bombarded when going in but as Protoss you just out macro them and lead with Immortals.

" Terran Mech, FTW! "

Turrets and ravens would've let you see the roaches, thus making it less of a problem.

At what point do you stop producing scv's? I usually have 3 going in and out of my refineries and i would say 12 or 14 harvesting, also other than MMM what other units are a good combo together? I've found success a couple of times with hellions/thors/tanks but want to try different combination's

Marines/Marauders/Medvacs.
 
Learn it. Love it.

" Terran Mech, FTW! "

anybody try to nuke the opponent? MMM wasn't working overly well for me, so I think I'm going to try it out a bit. I found an article on liquipedia, but any suggestions would be nice

Terran Tips:
Don't show fear or they will eat you alive.
Protoss will make hallucinations.  Use a detector even if they have no DT.
Don't give up!  Fly you barracks away and they may DC before finding it.
It's fun to block their vision with that factory you never use.
If you see a swarm of banelings: RUN.

Don't give up!  Fly you barracks away and they may DC before finding it.

It's fun to block their vision with that factory you never use.

" I've found that a mix of hellions and marauders can be pretty devastating against a Tier One/early 2 Zerg force, even some Terran forces if you get them early before they start viking spamming.  Any thoughts on how to go after Protoss?  I often feel completely vulnerable to them, while simultaneously unable to crack their d. "

" At what point do you stop producing scv's? I usually have 3 going in and out of my refineries and i would say 12 or 14 harvesting, also other than MMM what other units are a good combo together? I've found success a couple of times with hellions/thors/tanks but want to try different combination's "

What does the ghosts emp do? excuse my ignorance I'm not well versed on terran just yet, also how would vikings take out colossi? I thought vikings were AA only? or can they be upgraded ?

" What does the ghosts emp do? excuse my ignorance I'm not well versed on terran just yet, also how would vikings take out colossi? I thought vikings were AA only? or can they be upgraded ? "

gotcha, also i tend to get fucked by Temps, i just usually scan to pick them up but is there any unit that can detect them? It seems my sensor array does nothing

" @Fallen189: Kinda surprised you know MMM.  :P "

" I watch a lot of Huskys replays. Even though I'm not playing at the moment, I still enjoy his replays. I love watching a good ZVP match. "

" @Fallen189 said:

" I watch a lot of Huskys replays. Even though I'm not playing at the moment, I still enjoy his replays. I love watching a good ZVP match. "

Pro Tip - If you want to learn the "why" in online, graduate up to Day9.  It'll help out more in the long run. "

" Terran Tips:
Don't give up!  Fly you barracks away and they may DC before finding it.

" Don't do this, it is just a jackass move and it really isn't the end of the world if you lose 1 game. "

" @MaFoLu said:

" Don't do this, it is just a jackass move and it really isn't the end of the world if you lose 1 game. "

I dunno, if you're one game away from being demoted to a lower rank, I'd much rather bm than take the hit on rank.  :\  Sorry man, it can take days to get back into a League...and if I was under the choice of lose rank, or luck out of a bm win...I'd take the win. "

So far my biggest problem with being a Terran is expanding.  The only benefit I have found so far is that I can build the cc in my base then float it off to my new area but trying to D that up as well seems like a big hassle for me.

" gotcha, also i tend to get fucked by Temps, i just usually scan to pick them up but is there any unit that can detect them? It seems my sensor array does nothing "

It's a pointless argument because it's not even the slightest bit BM if you are lifting your buildings to force a draw. It's just one of the features of the terran race, and if you are getting into a base race against a terran and you don't make sure to keep a unit that can attack air, you don't deserve to win the game. Why would you not use your race to it's full potential? Throwing is in the game. 

The only exception is if the Terran knows that the protoss has the capability to kill his floating buildings and the Terran is just being an asshole and trying to drag out the game that's a sure loss, though that's a completely different situation. That said, it's pretty fucked up that Blizzard still hasn't implemented a mutual draw feature so people are forced to do stupid shit like this if they want the win. 

"

It's a pointless argument because it's not even the slightest bit BM if you are lifting your buildings to force a draw. It's just one of the features of the terran race, and if you are getting into a base race against a terran and you don't make sure to keep a unit that can attack air, you don't deserve to win the game. Why would you not use your race to it's full potential? Throwing is in the game. 

The only exception is if the Terran knows that the protoss has the capability to kill his floating buildings and the Terran is just being an asshole and trying to drag out the game that's a sure loss, though that's a completely different situation. That said, it's pretty fucked up that Blizzard still hasn't implemented a mutual draw feature so people are forced to do stupid shit like this if they want the win. 

"