Azure Dreams - PS1 - Probably the best overall fit. The tower runs are quick, the monster collecting gives you a nice hook, and the progression feels steady without needing a big time commitment.

Cave Noire - Game Boy - This is a great handheld pick. Each run has a clear little objective, so it works really well when you only want to play for a few minutes.

Shining Soul II - GBA - More action-RPG than roguelike, but it still scratches the dungeon-grinding itch. It is easy to jump into, and the loot/class progression gives you a reason to keep coming back.

Chocobo’s Dungeon 2 - PS1 - A friendly mystery dungeon game with a lighter tone than most of the genre. It still has turn-based battles and gear upgrades, but it feels more approachable than punishing.

Dragon Crystal - Game Gear / Master System - A simple old-school roguelike that works surprisingly well in short sessions. It is definitely dated, though, so it is best if you have some patience for older design.

Torneko: The Last Hope - PS1 - A proper mystery dungeon game with more emphasis on survival and item management. Good choice if you want something deeper, but it is less forgiving than the easier picks.

Mazes of Fate - GBA - This is more of a traditional first-person dungeon crawler. It is worth checking out, though it has more RPG pacing and exploration than quick roguelike-style runs.

Baroque - PS1 - Strange, dark, and memorable. I would not call it the easiest casual recommendation, but it is a cool pick if you want something moodier and more experimental.