Games like Warhammer 40,000: Mechanicus
Games like Warhammer 40,000: Mechanicus include XCOM 2, STAR WARS Zero Company™, XCOM®: Chimera Squad, XCOM: Enemy Unknown, and BattleTech. We matched them by the tags players give Warhammer 40,000: Mechanicus on Steam (Strategy, Turn-Based Tactics, Turn-Based Combat, Sci-fi, and Turn-Based): closest matches first, and among equally close ones the better-known games.

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

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

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

XCOM: Enemy Unknown
Shared: Strategy · Sci-fi · Turn-Based

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

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

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

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

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

Darkest Dungeon®
Shared: Turn-Based Combat · Strategy · Turn-Based

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

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

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

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

The Banner Saga 3
Shared: Strategy · Turn-Based Tactics · Turn-Based Combat

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

The Dungeon Of Naheulbeuk: The Amulet Of Chaos
Shared: Turn-Based Tactics · Strategy · Turn-Based

ENDLESS Legend™
Shared: Strategy · Turn-Based · Turn-Based Strategy

Library Of Ruina
Shared: Strategy · Turn-Based Combat · Great Soundtrack

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

Quasimorph
Shared: Strategy · Turn-Based Combat · Singleplayer

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

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

Othercide
Shared: Strategy · Turn-Based Tactics · Turn-Based Combat