Terran v Zerg: Marauder Hellion All-In

This is a very powerful all-in strategy which makes use of the high damage of marauders against buildings, queens and defensive roaches as well as the power of hellions against zerglings and drones. When orchestrated correctly this build produces a crippling attack which when unprepared for usually wins outright or does substantial damage.

0 – Supply Depot
12 – Barracks
13 – Refinery
16 – Marine
17 – Orbital command upgrade
17 – Barracks
17 – Supply depot
17 – SCV
18 – Marine
19 – SCV
20 – Factory
20 – Reactor on barracks

Pull one SCV from the refinery

20 – Tech lab on barracks
20 – SCV
21 – Supply depot
Swap Reactor from barracks to factory
23 – Marauder
25 – SCV x2
27 – Hellions x2
31 – Supply depot
31 – Tech lab on barracks
32 – SCV 33 – Hellions x2

Pull another SCV from the refinery

37 – Marauder
39 – Marauder
41 – Last SCV
42 – Hellions x2
46 – Supply Drop
46 – Marauders x2
50 – Supply Depot

From here you can constantly produce units rallying to the front line. If the attack fails you should have done enough damage to cripple your opponent. You should be wary of early mutalisks as well as baneling attacks following a failed attack. You can try to fortify a second command center at your natural, particularly if you have extra minerals during the assault for a backup plan. You can continue to make marauders and hellions for a second attack or switch to a more conventional unit composition.

Terran v Zerg: Hellion/Banshee

This build focuses on using low risk high reward economically damaging harassing techniques which include the hellion and banshee to gain an early edge against a zerg opponent.

10 – Supply depot
12 – Barracks
16 – Marine
17 – Orbital command upgrade
17 – Command center
17 – Refinery x2
18 – Supply depot
20 – Marine
21 – Bunker
22 – Factory
22 – Reactor on barracks
23 – Orbital command upgrade
25 – Starport
25 – Give reactor to factory
27 – Hellion x2
33 – Supply depot
33 – Tech lab on barracks

 From here you should have more than four hellions to control the map and deny creep spread and if possible get into the drone line to do some economic damage, but it is not necessary to sacrifice your hellions for drone kills. The starport should start researching cloak and producing banshees as soon as possible to harass and kill queens in tandem with the hellions. The game can progress in many ways, mech or marine, medivac and tank compositions are the natural progressions from this build.