Games like Little Heroes
Games like Little Heroes include Age of History 3, Mount & Blade II: Bannerlord, Age of Empires II (Retired), Wargame: Red Dragon, and Broken Arrow. We matched them by the tags players give Little Heroes on Steam (Wargame, RTS, Strategy, 2D, and Medieval): closest matches first, and among equally close ones the better-known games.

Age of History 3
Shared: Wargame · Strategy · RTS

Mount & Blade II: Bannerlord
Shared: Strategy · Medieval · War

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

Wargame: Red Dragon
Shared: RTS · Strategy · Wargame

Broken Arrow
Shared: Wargame · Strategy · RTS

Total War: MEDIEVAL II – Definitive Edition
Shared: Strategy · Medieval · RTS

Company of Heroes 3
Shared: Wargame · Strategy · RTS

Master of Command
Shared: Strategy · RTS · War

Steel Division 2
Shared: RTS · Strategy · War

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

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

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

Regiments
Shared: Wargame · Strategy · RTS

A Total War Saga: THRONES OF BRITANNIA
Shared: Strategy · RTS · Medieval

WARNO
Shared: Wargame · RTS · Strategy

Total War: ATTILA
Shared: Strategy · RTS · War

Ultimate General: Civil War
Shared: Wargame · RTS · War

Company of Heroes 2
Shared: Strategy · RTS · War

Crusader Kings III
Shared: Strategy · Medieval · RTS

DEFCON
Shared: Strategy · War · Singleplayer

Rusted Warfare - RTS
Shared: RTS · Strategy · 2D

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

Kingdom Heroes 8
Shared: RTS · Wargame · Strategy

Becastled
Shared: Strategy · RTS · Medieval