In celebration of the release of (opens in new tab) Crypt of the Necrodancer, maybe, Valve has collected some of Steam's best roguelikes and lopped off much of the cost. The Steam Roguelike (opens in new tab) Sale runs over the weekend, and discounts roguelikelike heavy hitters like FTL, Rogue Legacy, Risk of Rain and Spelunky, and even a couple of fits-the-rigid-definition-of-a-roguelike, also known as 'proper' roguelikes, too.
My picks of the bunch would be Delver (opens in new tab) for 50% off, a first-person dungeon crawl with great music; the maybe-too-grindy-but-still-good Rogue Legacy (opens in new tab) for 75% off; the deeper-than-Moria NEO Scavenger (opens in new tab) for 33% less; Spelunky (opens in new tab) for chump change; and the fab One Way Heroics (opens in new tab) for a ridiculous 77p. You can also grab Binding of Isaac: Rebirth (opens in new tab) for 33% off, FTL (opens in new tab) for just under £2, and, well, browse the list yourself (opens in new tab), there's a load of great stuff here.
The Steam Roguelike Sale ends Monday 27th April at 10am PST, which my brain always tells me stands for 'PlaneScape Torment'.