Games like Lone King: Expansion
Games like Lone King: Expansion include Into the Breach, FTL: Faster Than Light, BattleTech, XCOM: Enemy Unknown, and The Last Spell. We matched them by the tags players give Lone King: Expansion on Steam (Strategy, Indie, Tactical, Turn-Based Strategy, and Space): closest matches first, and among equally close ones the better-known games.

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

FTL: Faster Than Light
Shared: Strategy · Indie · Space

BattleTech
Shared: Strategy · Turn-Based Strategy · Tactical

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

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

Sid Meier's Civilization®: Beyond Earth™
Shared: Strategy · Turn-Based Strategy · Space

Crying Suns
Shared: Strategy · Indie · Space

XCOM 2
Shared: Strategy · Tactical · Sci-fi

Total War: THREE KINGDOMS
Shared: Strategy · Turn-Based Strategy · Tactical

Cosmoteer: Starship Architect & Commander
Shared: Indie · Strategy · Space

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

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Tactical · Indie

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

Warhammer 40,000: Mechanicus
Shared: Strategy · Tactical · Sci-fi

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

Total War: WARHAMMER III
Shared: Strategy · Turn-Based Strategy · Real Time Tactics

Aliens: Dark Descent
Shared: Strategy · Tactical · Real Time Tactics

Halfway
Shared: Strategy · Indie · Turn-Based Strategy

ENDLESS Space™ - Definitive Edition
Shared: Strategy · Space · Turn-Based Strategy

Total War: EMPIRE – Definitive Edition
Shared: Strategy · Turn-Based Strategy · Tactical

ENDLESS Space™ 2
Shared: Strategy · Space · Turn-Based Strategy

Your Only Move Is HUSTLE
Shared: Strategy · Turn-Based Strategy · 2D

Wargroove
Shared: Strategy · Turn-Based Strategy · Indie

Door Kickers
Shared: Strategy · Tactical · Indie