24 games ranked by how much the tags Steam players vote on them overlap with Mage and Monsters'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: Auto Battler, Rogue-like, Strategy, Pixel Graphics, Perma Death, Top-Down.

1·Astronarch
81% match · Auto Battler, Rogue-like
89% of 1,146 reviews positive

2·Dungeon 100
78% match · Auto Battler, Perma Death
82% of 1,636 reviews positive

3·Nomad Survival
78% match · Auto Battler, Rogue-like
84% of 2,194 reviews positive

4·Time Walker: Dark World
77% match · Auto Battler, Top-Down
86% of 1,510 reviews positive

5·Gladiator Guild Manager: Prologue
77% match · Auto Battler, Magic
93% of 1,556 reviews positive

6·Warpips
77% match · Auto Battler, War
87% of 5,225 reviews positive

7·Unalive
75% match · Perma Death, Rogue-like
72% of 384 reviews positive

8·Loot Hero DX
75% match · Auto Battler, Dragons
74% of 1,521 reviews positive

9·Rift Wizard
75% match · Perma Death, Magic
92% of 1,064 reviews positive

10·The Last Flame
75% match · Auto Battler, Rogue-like
85% of 2,941 reviews positive · 22 playing

11·Despot's Game: Dystopian Battle Simulator
75% match · Auto Battler, Rogue-like
84% of 3,361 reviews positive

12·Dota Underlords
75% match · Auto Battler, Strategy
82% of 90,943 reviews positive · 768 playing

13·Infinite Tao
75% match · Auto Battler, Perma Death
80% of 885 reviews positive

14·Endgame of Devil
74% match · Auto Battler, Magic
89% of 1,043 reviews positive

15·Teamfight Manager
74% match · Auto Battler, Management
87% of 5,894 reviews positive

16·Songs of Silence
74% match · Auto Battler, Magic
81% of 2,780 reviews positive · 12 playing

17·Heretic's Fork
73% match · Auto Battler, Perma Death
85% of 4,129 reviews positive · 9 playing

18·Samawa Idle
72% match · Auto Battler, Rogue-like
66% of 625 reviews positive

19·Crown Trick
72% match · Perma Death, Rogue-like
85% of 5,397 reviews positive

20·Slice & Dice
72% match · Dragons, Perma Death
97% of 2,587 reviews positive · 34 playing

21·Legion TD 2 - Multiplayer Tower Defense
72% match · Auto Battler, Magic
86% of 15,326 reviews positive

22·Bad North: Jotunn Edition
72% match · Auto Battler, Wargame
93% of 14,371 reviews positive

23·Dwarves: Glory, Death and Loot
71% match · Auto Battler, Perma Death
82% of 2,722 reviews positive · 97 playing

24·The Mageseeker: A League of Legends Story™
71% match · Magic, Combat
84% of 2,767 reviews positive
The closest matches to Mage and Monsters on Steam are Astronarch, Dungeon 100, Nomad Survival, Time Walker: Dark World, Gladiator Guild Manager: Prologue. They rank highest because their Steam community tags overlap most with Mage and Monsters's, and shared tags include Auto Battler, Rogue-like, Strategy.
Every game is described by the tags Steam players vote on it. Rare, specific tags such as Auto Battler, Rogue-like, Strategy count far more than catch-all ones like "Indie" or "Singleplayer", and each game is scored on how closely its whole tag profile matches Mage and Monsters's. Popularity never affects the ranking.