Games like Warhammer: Dark Omen (Classic)
Games like Warhammer: Dark Omen (Classic) include Total War: WARHAMMER II, Total War: WARHAMMER III, Broken Arrow, Company of Heroes 3, and Wargame: Red Dragon. We matched them by the tags players give Warhammer: Dark Omen (Classic) on Steam (Strategy, RTS, Wargame, 2.5D, and Atmospheric): closest matches first, and among equally close ones the better-known games.

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

Total War: WARHAMMER III
Shared: Strategy · RTS · Fantasy

Broken Arrow
Shared: Strategy · Wargame · RTS

Company of Heroes 3
Shared: Strategy · Wargame · RTS

Wargame: Red Dragon
Shared: Strategy · RTS · Wargame

Company of Heroes 2
Shared: Strategy · RTS · Tactical

Terminator: Dark Fate - Defiance
Shared: Strategy · RTS · Wargame

Age of Mythology: Extended Edition
Shared: Strategy · RTS · Fantasy

Aliens: Dark Descent
Shared: Strategy · RTS · Tactical

Mechabellum
Shared: Strategy · Wargame · RTS

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

Age of History 3
Shared: Strategy · Wargame · RTS

SpellForce 3 Reforced
Shared: Strategy · RTS · Fantasy

Steel Division 2
Shared: Strategy · RTS · Wargame

Regiments
Shared: Strategy · Wargame · RTS

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

Total War: ATTILA
Shared: Strategy · RTS · Tactical

Warhammer 40,000: Dawn of War III
Shared: Strategy · RTS · Atmospheric

Homeworld 3
Shared: RTS · Strategy · Tactical

Syrian Warfare
Shared: RTS · Wargame · Strategy

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

Men of War: Assault Squad 2
Shared: Strategy · RTS · Tactical

WARNO
Shared: Wargame · RTS · Strategy

Command & Conquer™ Remastered Collection
Shared: Strategy · RTS · 1990's