Games like Iron Marines Invasion
Games like Iron Marines Invasion include Aliens: Dark Descent, Broken Arrow, Sudden Strike 4, Door Kickers 2: Task Force North, and Battlefleet Gothic: Armada (Classic). We matched them by the tags players give Iron Marines Invasion on Steam (RTS, Action RTS, Action Roguelike, Real Time Tactics, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

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

Broken Arrow
Shared: RTS · Strategy · Action RTS

Sudden Strike 4
Shared: RTS · Real Time Tactics · Action RTS

Door Kickers 2: Task Force North
Shared: Real Time Tactics · Tactical · Military

Battlefleet Gothic: Armada (Classic)
Shared: RTS · Strategy · Sci-fi

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

Men of War: Assault Squad 2
Shared: RTS · Strategy · Real Time Tactics

Wargame: Red Dragon
Shared: RTS · Strategy · Military

Total War: WARHAMMER III
Shared: RTS · Strategy · Real Time Tactics

Company of Heroes 3
Shared: RTS · Strategy · Action RTS

Battlefleet Gothic: Armada 2
Shared: RTS · Real Time Tactics · Strategy

Total War: THREE KINGDOMS
Shared: RTS · Strategy · Military

WARNO
Shared: RTS · Real Time Tactics · Military

Starship Troopers: Terran Command
Shared: RTS · Strategy · Military

Planetary Annihilation: TITANS
Shared: RTS · Real Time Tactics · Strategy

Iron Marines
Shared: RTS · Strategy · Sci-fi

Homeworld Remastered Collection
Shared: RTS · Strategy · Sci-fi

Company of Heroes 2
Shared: RTS · Strategy · Tactical

Warhammer Age of Sigmar: Realms of Ruin
Shared: RTS · Action RTS · Strategy

Call to Arms
Shared: RTS · Strategy · Military

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Real Time Tactics · Tactical

Warhammer 40,000: Dawn of War III
Shared: RTS · Strategy · Sci-fi

Homeworld 3
Shared: RTS · Strategy · Sci-fi

Company of Heroes
Shared: RTS · Strategy · Military