Would Xcom EU/EW count as a rogue-like? I always felt it was a hugely scaled up rogue-like strategy. It is incredibly appealing and should happen more often...not just on PC.
Kind of, if you look at the entire game, from starting a campaign to finishing it. But, it's an awkward fit.
Rogue was a single character RPG where you start in a randomly generated map, populated with monsters, and see how far you can get. While people have gotten good enough with these to roll out consistent wins, the expectation is defeat.
X-COM, in most of it's incarnations, is a strategy game with highly fragile units. The unit fragility is Rogueish, but the rest of the game is pretty clearly not the same genre. It shares the permadeath element, but that's more a result of it being a strategy game, rather than it being a Roguelike.
If you turn on enough of the Second Wave settings in Enemy Unknown/Enemy Within, you can get something that is lot closer to a roguelike. Just like you can choose to play Dark Souls or Bloodbourne as a Roguelike by applying additional restrictions onto yourself. But, it's not really in the genre.
If you want to play XCOM like a roguelike, using the Second Wave settings, you're looking at starting with, at least, Ironman, Not Created Equally, and Hidden Potential enabled. Adding modifiers like Training Roulette, E-115, Total Loss, and New Economy can all push that further.
Even then, as a roguelike, XCOM is unusually long. Usually in the genre we're talking about short, discrete play sessions. As a genre, there's been a move towards long term progression as a result, but XCOM isn't really about an individual mission as "the game" with a few progression systems attached.
Darkest Dungeon bleeds towards XCOM at the end, and there's certainly a natural transition from the advancement systems in something like Rogue Legacy and XCOM's tech progression. But, the priorities are slightly different. As a result of XCOM we probably will see more XCOM like elements in the Roguelike genre, and XCOM2's randomly generated maps suggest they're going in more of a Roguelike direction with that game. But, at least EU/EW is an edge case, at best.
Legend of Grimrock - a 3D roguelike mixed with some Might and Magic
Honestly, not so much a roguelike. Grimrock basically is a modern dungeon crawler like Might and Magic. It'd be a little like saying Skyrim or Dark Souls is a Roguelike. Kinda, sorta, not really. Though you can play it like one.