Mass Effect 2 & Mass Effect 3
Kruban is a tidally-locked Venusian hothouse, its surface perpetually obscured by clouds of sulfur and carbon dioxides. The first group of krogan brought into orbit by the salarian uplift teams requested a trip to Kruban. The salarians at first thought the krogan were confused about the nature of Kruban's environment; the planet is named for a krogan mythological paradise in which honorable warriors feast on the internal organs of their enemies. In fact, krogan astronomers had correctly deduced the nature of Kruban in the years before the global holocaust. In the two millennia since, Kruban had come to be thought of as an ideal test of one's toughness.
Every year, a few krogan attempt to land on Kruban and exit their ships naked in an attempt to prove their "kroganhood." The planet's surface is littered with the crushed, corroded remains of their ships. Only one, Shath Norda, is known to have returned from the surface alive. albeit with most of his bones crushed and all four of his lungs damaged by sulfuric gas. Norda recovered from his trial, to the adulation of his people. Until he died in 1943, he could lie with any fertile female he wished.