this is a tier 2 a new zerg unit they made!

hp:145
cost: 75 minerals and 25 gas
supply: 1
attack type: acidic saliva
damage: 16 (+1 for every upgrade)
armor: 2 (+1)
speed: normal
attack range: 3

this new unit is capable of soaking up some damage and spitting out its own, and with the health regnerating ability to gain health faster (possibly 20 hp/second underground) its possible to destroy a whole platoon with just 6 roaches..

upgrades:
attack range upgrades (+1) has up to three levels
armor upgrades (+1) has up to three levels

Glial Reconstitution: Increases movement speed

Tunneling Claws: makes the Roaches able to move while burrowed.

Organic Carapace: increases regeneration rate of all Roaches (possibly up to 70hp/sec when underground and 45 outside)

main Role?? Assault unit (though some say Tanking unit or harrassing unit)