24 games ranked by how much the tags Steam players vote on them overlap with Tactical Genius Online'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: Free to Play, Turn-Based Tactics, Turn-Based, MOBA, Hex Grid, Turn-Based Strategy.

1·Atlas Reactor
90% match · Free to Play, Turn-Based Tactics
84% of 5,291 reviews positive

2·Battle for Wesnoth
89% match · Hex Grid, Free to Play
94% of 6,027 reviews positive

3·Farabel
87% match · Hex Grid, Turn-Based
73% of 113 reviews positive

4·Grace of Zordan
86% match · Chess, Free to Play
57% of 173 reviews positive

5·Warbands: Bushido
85% match · Hex Grid, Turn-Based Tactics
70% of 1,223 reviews positive

6·Immortal Empire
84% match · Free to Play, Turn-Based Tactics
72% of 310 reviews positive

7·Tactical Monsters Rumble Arena
84% match · Free to Play, Turn-Based
89% of 4,469 reviews positive

8·Hex Commander: Fantasy Heroes
83% match · Hex Grid, Free to Play
78% of 313 reviews positive

9·Bombix
83% match · Free to Play, Turn-Based Combat
71% of 1,546 reviews positive

10·Clatter
82% match · Turn-Based Tactics, Turn-Based Combat
83% of 1,270 reviews positive

11·King's Bounty: Crossworlds
81% match · Hex Grid, Turn-Based Strategy
92% of 1,659 reviews positive

12·Dogs of War Online
81% match · Free to Play, Turn-Based Strategy
63% of 713 reviews positive

13·Fantasy General II
81% match · Hex Grid, Turn-Based Tactics
81% of 1,985 reviews positive

14·Epic Arena
81% match · Free to Play, Turn-Based Tactics
65% of 305 reviews positive

15·Chaos Reborn
81% match · Hex Grid, Turn-Based
75% of 1,146 reviews positive

16·King's Bounty II
80% match · Hex Grid, Turn-Based Strategy
62% of 5,546 reviews positive

17·Fantasy Wars
80% match · Hex Grid, Turn-Based
86% of 319 reviews positive

18·King's Bounty: Armored Princess
80% match · Hex Grid, Turn-Based Strategy
91% of 1,440 reviews positive · 61 playing

19·Regimental Chess
80% match · Chess, Turn-Based Tactics
55% of 331 reviews positive

20·Blackguards 2
80% match · Hex Grid, Turn-Based
67% of 1,316 reviews positive

21·RAM Pressure
80% match · Turn-Based Tactics, Turn-Based
47% of 984 reviews positive

22·The Banner Saga: Factions
80% match · Free to Play, Turn-Based
74% of 843 reviews positive

23·King's Bounty: The Legend
80% match · Hex Grid, Turn-Based Strategy
91% of 4,047 reviews positive

24·Order of Battle: World War II
79% match · Hex Grid, Free to Play
79% of 3,179 reviews positive
The closest matches to Tactical Genius Online on Steam are Atlas Reactor, Battle for Wesnoth, Farabel, Grace of Zordan, Warbands: Bushido. They rank highest because their Steam community tags overlap most with Tactical Genius Online's, and shared tags include Free to Play, Turn-Based Tactics, Turn-Based.
Every game is described by the tags Steam players vote on it. Rare, specific tags such as Free to Play, Turn-Based Tactics, Turn-Based count far more than catch-all ones like "Indie" or "Singleplayer", and each game is scored on how closely its whole tag profile matches Tactical Genius Online's. Popularity never affects the ranking.