As Terran
Make:
Cyclone
Marauder
Siege TankWalling and focused fire keep Hellions from choosing the fight.
Open in the counter tool with Hellion tagged ->As Protoss
Make:
Adept
Stalker
ImmortalAdepts and walls protect probes until stronger tech arrives.
Open in the counter tool with Hellion tagged ->As Zerg
Make:
Queen
Roach
ZerglingQueens and walls protect drones; Roaches end the dive threat.
Open in the counter tool with Hellion tagged ->
Marine
Reaper
Hellbat
Widow Mine
Thor
Viking
Medivac