You can pick up Borderlands, Pillars of Eternity, Tyranny and many more all-consuming games in the latest Humble RPG Bundle.
As usual, it's a multi-tier affair with the more money you commit granting you access to even more games. Starting at a ridiculously low 83p, you'll get Hiveswap: Act 1, Deep Sky Derelicts and Immortal Planet for the minimum investment. I haven't had the pleasure of trying any of these games for myself, though hearing Deep Sky Derelicts described as a "procedurally-generated roguelite turn-based RPG with cards" has me intrigued. That is, after recovering from the barrage of buzzwords.
Things get a little more recognisable on the second tier, though, where you can pay 3.48 to get Tyranny, Pillars of Eternity and Cat Quest. Now, the first two are easily up there with some of the best cRPGs of the modern era. Perhaps not quite Divinity: Original Sin level, but both are undoubtedly terrific games. As for Cat Quest, well, do you really need any more convincing after hearing that title?