>>3778947
Refer to https://www.youtube.com/watch?v=-13LUfagQhY
>b-but I don't want to watch a 15 minute youtube video from a mentally ill man!
Well, his definition boils down to
>top-down
>grid-based
>turn-based
>with stats and items
>and procedural generation
He reasons that this covers all games classically considered roguelikes, and excludes games that are obviously not roguelikes, and then spends some time justifying the omission of permadeath from his requirements.

>>3778989
Diablo is generally not considered a rogulike, since it's realtime (and past the first game, doesn't really have a meaningful tile grid). Other than that, it would qualify.
The original Diablo actually started development as a roguelike game. Making it realtime was a demand from the publisher.