24 games ranked by how much the tags Steam players vote on them overlap with Once upon a Dungeon II's. A rare tag counts for far more than one that sits on half the store, and popularity never moves a game up.
What they share most: Traditional Roguelike, Grid-Based Movement, Procedural Generation, Rogue-like, Loot, Dungeon Crawler.

1·Sproggiwood
86% match · Traditional Roguelike, Grid-Based Movement
80% of 595 reviews positive

2·Dungeonmans
86% match · Traditional Roguelike, Grid-Based Movement
91% of 1,237 reviews positive · 5 playing

3·Shattered Pixel Dungeon
82% match · Traditional Roguelike, Dungeon Crawler
95% of 2,213 reviews positive

4·Drawngeon: Dungeons of Ink and Paper
81% match · Grid-Based Movement, Inventory Management
81% of 78 reviews positive

5·Dungeons of Dredmor
81% match · Traditional Roguelike, Rogue-like
94% of 5,442 reviews positive · 18 playing

6·Shattered Planet
79% match · Traditional Roguelike, Grid-Based Movement
68% of 661 reviews positive · 1 playing

7·Sword of the Stars: The Pit
79% match · Traditional Roguelike, Loot
83% of 1,555 reviews positive

8·Elin
78% match · Traditional Roguelike, Loot
93% of 9,256 reviews positive

9·Stoneshard: Prologue
77% match · Dungeon Crawler, Inventory Management
87% of 3,556 reviews positive

10·Megaloot
77% match · Inventory Management, Loot
72% of 4,010 reviews positive

11·Low Magic Age
75% match · Traditional Roguelike, Grid-Based Movement
89% of 3,534 reviews positive

12·Dredgers
75% match · Traditional Roguelike, Dungeon Crawler
89% of 506 reviews positive

13·Rift Wizard
75% match · Traditional Roguelike, Dungeon Crawler
92% of 1,064 reviews positive

14·Legend of Grimrock 2
74% match · Grid-Based Movement, Dungeon Crawler
91% of 4,087 reviews positive

15·Blocky Dungeon
74% match · Grid-Based Movement, Dungeon Crawler
85% of 85 reviews positive

16·Mortal Sin
74% match · Dungeon Crawler, Loot
94% of 5,891 reviews positive

17·Quest of Dungeons
74% match · Traditional Roguelike, Dungeon Crawler
76% of 737 reviews positive

18·Monsters' Den Chronicles
74% match · Dungeon Crawler, Loot
79% of 81 reviews positive

19·Of Blades & Tails
73% match · Dungeon Crawler, Turn-Based Combat
76% of 412 reviews positive

20·FATE: The Cursed King
73% match · Dungeon Crawler, Loot
89% of 558 reviews positive · 1 playing

21·Wizardry 7: Crusaders of the Dark Savant
73% match · Grid-Based Movement, Dungeon Crawler
83% of 280 reviews positive

22·App 1627330
73% match · Inventory Management, Dungeon Crawler
94% of 35 reviews positive

23·Legend of Grimrock
73% match · Grid-Based Movement, Dungeon Crawler
93% of 6,747 reviews positive · 17 playing

24·Monsters' Den: Book of Dread
73% match · Dungeon Crawler, Loot
92% of 295 reviews positive
The closest matches to Once upon a Dungeon II on Steam are Sproggiwood, Dungeonmans, Shattered Pixel Dungeon, Drawngeon: Dungeons of Ink and Paper, Dungeons of Dredmor. They rank highest because their Steam community tags overlap most with Once upon a Dungeon II's, and shared tags include Traditional Roguelike, Grid-Based Movement, Procedural Generation.
Every game is described by the tags Steam players vote on it. Rare, specific tags such as Traditional Roguelike, Grid-Based Movement, Procedural Generation count far more than catch-all ones like "Indie" or "Singleplayer", and each game is scored on how closely its whole tag profile matches Once upon a Dungeon II's. Popularity never affects the ranking.