Games like Metal Mars
Games like Metal Mars include Cossacks 3, Company of Heroes 3, Mindustry, Age of Empires II (Retired), and Age of Mythology: Retold. We matched them by the tags players give Metal Mars on Steam (RTS, Resource Management, Local Multiplayer, Strategy, and 4 Player Local): closest matches first, and among equally close ones the better-known games.

Cossacks 3
Shared: RTS · Strategy · Resource Management

Company of Heroes 3
Shared: RTS · Strategy · Multiplayer

Mindustry
Shared: Resource Management · RTS · Strategy

Age of Empires II (Retired)
Shared: RTS · Strategy · Multiplayer

Age of Mythology: Retold
Shared: RTS · Strategy · Resource Management

Anno 1800
Shared: Strategy · Resource Management · RTS

Planetary Annihilation: TITANS
Shared: RTS · Strategy · Multiplayer

Age of Empires III: Definitive Edition
Shared: RTS · Strategy · Multiplayer

Warhammer 40,000: Dawn of War - Definitive Edition
Shared: RTS · Strategy · Multiplayer

Stick Fight: The Game
Shared: Local Multiplayer · Multiplayer · 4 Player Local

Broken Arrow
Shared: RTS · Strategy · Action RTS

STAR WARS™ Empire at War - Gold Pack
Shared: RTS · Strategy · Multiplayer

Battlefleet Gothic: Armada 2
Shared: RTS · Strategy · Multiplayer

Call to Arms - Gates of Hell: Ostfront
Shared: Strategy · RTS · Multiplayer

Anno 2070™
Shared: Strategy · RTS · Resource Management

Total War: WARHAMMER II
Shared: RTS · Strategy · Multiplayer

Sins of a Solar Empire II
Shared: RTS · Strategy · Multiplayer

Factorio
Shared: Resource Management · Strategy · Multiplayer

Oxygen Not Included
Shared: Resource Management · Strategy · 2D

Company of Heroes 2
Shared: RTS · Strategy · Multiplayer

Battlefleet Gothic: Armada (Classic)
Shared: RTS · Strategy · Multiplayer

Rusted Warfare - RTS
Shared: RTS · Strategy · Multiplayer

Command & Conquer™ Remastered Collection
Shared: RTS · Strategy · Multiplayer

Duck Game
Shared: Local Multiplayer · Multiplayer · 4 Player Local