My brother recently mentioned the phone game Slice and Dice. Goddammit, brother! It’s eight bucks, horribly spent, because I’ve already put dozens of hours into this stupid little deeply engrossing dungeon crawl of a game.
The scenario is that you’ve got five (usually) adventurers facing a series of twenty increasingly-difficult battles. On your turn, you roll a six-sided die for each adventurer, and each side has a result, ranging from the useless (an X) to the actively harmful (self-harm) to the much more common helpful (attack, mana gain, healing, shield, etc.).
Lots of modifiers come into play to keep things interesting: most dice sides have pips, and some of them cleave (hitting allies or enemies to either side of your target), and some of them are ranged damage, and some grow in power over time, and some do double-damage against an enemy attacking you, and so on.
You can roll dice up to three times, keeping any or all of the dice after each roll. Then you take your actions, finish your turn, and the baddies get their turn. Continue until one side is dead.
After odd-numbered battles, you gain magic items. After even-numbered battles, one of your heroes levels up into a new class in their general theme (so a rogue might level up into a ranger or an assassin), with entirely different and more powerful dice.
The final battles are really tricky, and very satisfying to win.
Eventually it’ll lose its hold on me, but goddammit, brother.