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

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

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

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

XCOM: Enemy Unknown
Shared: Turn-Based Strategy · Singleplayer · Turn-Based Tactics

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

Sid Meier’s Civilization® VI
Shared: Turn-Based Strategy · Singleplayer · Multiplayer

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

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

Company of Heroes 3
Shared: Singleplayer · Strategy · Multiplayer

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

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

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

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

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

Warside
Shared: Turn-Based Tactics · Turn-Based Strategy · PvP

The Battle of Polytopia
Shared: Turn-Based Strategy · Turn-Based Tactics · Singleplayer

Total War: WARHAMMER II
Shared: Turn-Based Strategy · Singleplayer · Strategy

Warhammer 40,000: Gladius - Relics of War
Shared: Turn-Based Strategy · Turn-Based Tactics · Multiplayer

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

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

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

Blood Bowl 3
Shared: PvP · Singleplayer · Turn-Based Strategy

Football, Tactics & Glory
Shared: Turn-Based Tactics · Turn-Based Strategy · Singleplayer

Blood Bowl 2: Legendary Edition (Classic)
Shared: Turn-Based Strategy · Singleplayer · Multiplayer