Games like Jagged Alliance 3
Games like Jagged Alliance 3 include XCOM 2, The Last Spell, Battle Brothers, STAR WARS Zero Company™, and XCOM®: Chimera Squad. We matched them by the tags players give Jagged Alliance 3 on Steam (Strategy, Turn-Based Tactics, Tactical, Turn-Based Strategy, and Turn-Based Combat): closest matches first, and among equally close ones the better-known games.

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

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

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

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

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

MENACE
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Fell Seal: Arbiter's Mark
Shared: Strategy · Turn-Based Tactics · RPG

Xenonauts 2
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Marvels Midnight Suns Digital Edition
Shared: Turn-Based Tactics · Turn-Based Strategy · Turn-Based Combat

Hard West 2
Shared: Turn-Based Tactics · Turn-Based Strategy · Strategy

Gears Tactics
Shared: Strategy · Turn-Based Tactics · Tactical

Mutant Year Zero: Road to Eden
Shared: Strategy · Turn-Based Tactics · Turn-Based Combat

Jagged Alliance 2 - Wildfire
Shared: Strategy · Turn-Based Tactics · RPG

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

XCOM: Enemy Unknown
Shared: Strategy · Tactical · Turn-Based Strategy

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

Disgaea 5 Complete
Shared: Strategy · Turn-Based Tactics · RPG

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

BattleTech
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Hard West
Shared: Strategy · Turn-Based Strategy · Turn-Based Combat

Tactical Breach Wizards
Shared: Turn-Based Tactics · Turn-Based Strategy · Tactical

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

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

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