As Terran
Make:
Marauder
Siege Tank
BansheeArmored damage and air pressure force Roaches to retreat.
Open in the counter tool with Roach tagged ->As Protoss
Make:
Immortal
Sentry
DisruptorImmortal value is massive if force fields control the surface area.
Open in the counter tool with Roach tagged ->As Zerg
Make:
Ravager
Lurker
MutaliskBreak the mirror with either better Biles or a tech switch.
Open in the counter tool with Roach tagged ->
Zergling
Baneling
Queen
Hydralisk
Corruptor
Overlord
Overseer