24 games ranked by how much the tags Steam players vote on them overlap with Future Wars'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: Strategy, Turn-Based, Turn-Based Strategy.

1·Disciples III - Resurrection
99% match · Strategy, Turn-Based
30% of 341 reviews positive

2·50 years
99% match · Strategy, Turn-Based Strategy
89% of 693 reviews positive

3·Antisquad
99% match · Strategy, Turn-Based
52% of 298 reviews positive

4·Eador. Masters of the Broken World
99% match · Strategy, Turn-Based Strategy
68% of 2,818 reviews positive

5·Heroes of Might & Magic V: Tribes of the East
99% match · Strategy, Turn-Based Strategy
93% of 3,284 reviews positive

6·Jagged Alliance 2 - Wildfire
98% match · Strategy, Turn-Based
80% of 1,943 reviews positive

7·Disciples III - Renaissance Steam Special Edition
97% match · Strategy, Turn-Based
51% of 545 reviews positive

8·Greed Corp
97% match · Turn-Based, Strategy
86% of 557 reviews positive

9·Might & Magic: Heroes VI
96% match · Strategy, Turn-Based Strategy
48% of 9,286 reviews positive

10·Ascension to the Throne
96% match · Strategy, Turn-Based
90% of 689 reviews positive

11·Sid Meier’s Ace Patrol: Pacific Skies
96% match · Strategy, Turn-Based
63% of 463 reviews positive

12·Eador: Genesis
96% match · Strategy, Turn-Based Strategy
84% of 463 reviews positive

13·Galaxy Admirals
95% match · Strategy, Turn-Based
80% of 235 reviews positive

14·ENDLESS Space™ 2
95% match · Strategy, Turn-Based Strategy
83% of 23,108 reviews positive

15·Fantasy Wars
95% match · Strategy, Turn-Based
86% of 319 reviews positive

16·Might & Magic® Heroes® VII
95% match · Strategy, Turn-Based Strategy
55% of 7,200 reviews positive

17·MoonBase Commander
94% match · Strategy, Turn-Based Strategy
90% of 184 reviews positive

18·Hero Academy
94% match · Strategy, Turn-Based
69% of 756 reviews positive

19·Jagged Alliance Flashback
94% match · Strategy, Turn-Based
47% of 777 reviews positive

20·Elven Legacy
94% match · Strategy, Turn-Based Strategy
75% of 195 reviews positive

21·Disciples Sacred Lands Gold
93% match · Strategy, Turn-Based
86% of 420 reviews positive

22·Skulls of the Shogun
92% match · Strategy, Turn-Based Strategy
90% of 870 reviews positive

23·Disciples III: Reincarnation
92% match · Turn-Based Strategy, Strategy
72% of 1,870 reviews positive · 22 playing

24·Heroes of Might & Magic V
91% match · Turn-Based Strategy, Strategy
88% of 4,318 reviews positive
The closest matches to Future Wars on Steam are Disciples III - Resurrection, 50 years, Antisquad, Eador. Masters of the Broken World, Heroes of Might & Magic V: Tribes of the East. They rank highest because their Steam community tags overlap most with Future Wars's, and shared tags include Strategy, Turn-Based, Turn-Based Strategy.
Every game is described by the tags Steam players vote on it. Rare, specific tags such as Strategy, Turn-Based, Turn-Based 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 Future Wars's. Popularity never affects the ranking.