Games like Chess Empire
Games like Chess Empire include Root, Dota Underlords, Axis and Allies 1942 Online, XCOM 2, and Chess Ultra. We matched them by the tags players give Chess Empire on Steam (Strategy, Chess, Tabletop, Tactical, and Turn-Based Tactics): closest matches first, and among equally close ones the better-known games.

Root
Shared: Strategy · Tabletop · Wargame

Dota Underlords
Shared: Strategy · Chess · Tactical

Axis and Allies 1942 Online
Shared: Strategy · Wargame · Tabletop

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

Chess Ultra
Shared: Strategy · Chess · Tabletop

Battle Brothers
Shared: Strategy · Tactical · Turn-Based Tactics

Twilight Struggle
Shared: Strategy · Tabletop · Wargame

Jagged Alliance 3
Shared: Strategy · Tactical · Turn-Based Tactics

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

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

STAR WARS Zero Company™
Shared: Strategy · Turn-Based Tactics · Tactical

Songs of Conquest
Shared: Tactical · Turn-Based Tactics · Strategy

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

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

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

MENACE
Shared: Strategy · Tactical · Turn-Based Tactics

BattleTech
Shared: Strategy · Turn-Based Tactics · Tactical

XCOM®: Chimera Squad
Shared: Strategy · Turn-Based Tactics · Tactical

Ultimate General: Civil War
Shared: Tabletop · Wargame · Strategy

5D Chess With Multiverse Time Travel
Shared: Chess · Strategy · Board Game

Into the Breach
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Warhammer 40,000: Chaos Gate - Daemonhunters
Shared: Strategy · Turn-Based Tactics · Tactical

Total War: ROME II - Emperor Edition
Shared: Strategy · Tactical · Turn-Based Strategy

The Conquest of Go
Shared: Strategy · Tabletop · Turn-Based Tactics