A Rachni? Aligha..Bar a Proteanok harci egysegeknek "fejlesztgettek" oket (miutan felfedeztek a Rachni fajt), a kialakulasuk alapbol termeszetes volt.
"The rachni, a species of spacefaring insects guided by a hive-mind intelligence, evolved on Suen, a planet tidally-locked to its red dwarf star. Life developed in a habitable terminator zone between hemispheres that were constantly scorched or perpetually frozen. The harsh conditions of Suen's surface forced the rachni to forage underground amid sprawling subterranean river systems.
Sometime at the height of the Prothean Empire, the Protheans discovered the rachni and bred them as weapons of war, selecting for the most cunning and warlike queens and unleashing rachni swarms on their enemies. Eventually, the rachni became too difficult to control and turned on their Prothean masters. The Protheans attempted to eradicate the rachni and destroyed as many as 200 worlds before they were satisfied the rachni were extinct, but enough survived on Suen to replenish their population."
A Geth volt az egyetlen mestersegesen letrehozott faj, amennyire tudom:)