Games like FireChess
Games like FireChess include Door Kickers, Plague Inc: Evolved, Age of Conquest IV, Town of Salem, and Rento Fortune: Online Dice Board Game (大富翁). We matched them by the tags players give FireChess on Steam (Strategy, Turn-Based Tactics, Board Game, 2D, and Top-Down): closest matches first, and among equally close ones the better-known games.

Door Kickers
Shared: Strategy · Tactical · Top-Down

Plague Inc: Evolved
Shared: Strategy · Multiplayer · Indie

Age of Conquest IV
Shared: Strategy · Free to Play · Multiplayer

Town of Salem
Shared: Strategy · Multiplayer · Indie

Rento Fortune: Online Dice Board Game (大富翁)
Shared: Strategy · Board Game · Multiplayer

Blood Bowl 2: Legendary Edition (Classic)
Shared: Strategy · Board Game · Multiplayer

The Last Spell
Shared: Strategy · Turn-Based Tactics · Tactical

XCOM 2
Shared: Strategy · Turn-Based Tactics · Tactical

SMITE®
Shared: Strategy · Free to Play · Multiplayer

The Conquest of Go
Shared: Strategy · Board Game · 2D

Space Hulk (Classic)
Shared: Strategy · Board Game · Tactical

100% Orange Juice
Shared: Board Game · Strategy · Multiplayer

Mordheim: City of the Damned
Shared: Strategy · Tactical · Turn-Based Tactics

World of Warships
Shared: Free to Play · Multiplayer · Strategy

Magic: The Gathering Arena
Shared: Strategy · Free to Play · Multiplayer

60 Seconds! Reatomized
Shared: 2D · Turn-Based Tactics · Strategy

Wargroove
Shared: Strategy · Turn-Based Tactics · Tactical

The Escapists 2
Shared: Strategy · Multiplayer · 2D

Through the Ages
Shared: Strategy · Board Game · Multiplayer

ShellShock Live
Shared: Strategy · 2D · Multiplayer

Heroes of Might and Magic: Olden Era
Shared: Strategy · Multiplayer · Turn-Based Tactics

Warhammer 40,000: Mechanicus
Shared: Strategy · Turn-Based Tactics · Tactical

Door Kickers 2: Task Force North
Shared: Top-Down · Tactical · Strategy

Awesomenauts
Shared: 2D · Multiplayer · Strategy