Drew Karpyshyn, lead writer on Mass Effect -- and the man responsible for the new Mass Effect prequel novel -- will reveal a new aspect of the Krogan each Wednesday on IGN. Last week we examined the biology of the Krogan. This week we get a history lesson that should add some context to the Krogan's place in the Mass Effect universe.
The Rise and Fall of the Krogan
Roughly 2000 years ago the Krogan were a primitive tribal species trapped on a world suffering through a nuclear winter of their own making. They were liberated from this state by the Salarians, who "culturally uplifted" the Krogan by giving them advanced technology and relocating them to a planet not cursed with lethal levels of radiation, toxins or deadly predators.
But the Salarian intervention was not without an ulterior motive. At the time the Citadel was engaged in a prolonged galactic war with the Rachni, a race of intelligent space-faring insects. The Salarians hoped the Krogan would join the Citadel forces as soldiers to stand against an otherwise unstoppable foe. The plan worked to perfection: within two generations the rapidly breeding Krogan had the numbers to not only drive the advancing Rachni back, but pursue them to their home worlds and eradicate the entire species.
For a brief period the Krogan were hailed as the saviors of the galaxy. But without the harsh conditions of Tuchanka to keep their numbers in check, their population exploded. Over crowded and running out of resources on their new home planet, the Krogan spread out to forcibly claim other worlds… worlds already inhabited by races loyal to the Citadel.
The so-called Krogan Rebellions continued for nearly three centuries. The Krogan sustained massive casualties, but their incredible birth rate kept their population steadily increasing. Victory seemed inevitable. In desperation, the Council turned to the recently discovered Turian Empire for aid. The Turians unleashed the genophage on the Krogan home worlds: a terrifying bio-weapon engineered by the Salarians. The genophage caused near total infant mortality in the Krogan species, with only 1 birth in every 1000 producing live offspring.
No longer able to replenish their numbers, the Krogan were forced to accept the Turian terms of surrender. For their role in quelling the Krogan Rebellions the Turians were rewarded with a seat on the Citadel Council. The Krogan, on the other hand, still suffer from the incurable effects of the genophage. Over the last millennium Krogan numbers have steadily declined, leaving them a scattered and dying people. Faced with the certainty of their extinction as a species, most Krogan have become individualistic and completely self-interested. They typically serve as mercenaries for hire to the highest bidder, though many still resent and despise the Citadel races that condemned them to their tragic fate.
Check back next Wednesday as we wrap up our three-part look at the Krogan.