Games like Front Frontiers
Games like Front Frontiers include Hearts of Iron IV, Europa Universalis IV, Age of History II, Europa Universalis V, and Age of History 3. We matched them by the tags players give Front Frontiers on Steam (Simulation, Strategy, Wargame, Pixel Graphics, and Grand Strategy): closest matches first, and among equally close ones the better-known games.

Hearts of Iron IV
Shared: Strategy · Grand Strategy · War

Europa Universalis IV
Shared: Strategy · Simulation · Grand Strategy

Age of History II
Shared: Strategy · Grand Strategy · War

Europa Universalis V
Shared: Strategy · Simulation · Grand Strategy

Age of History 3
Shared: Strategy · Wargame · Grand Strategy

Victoria 3
Shared: Simulation · Strategy · Grand Strategy

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

Victoria II
Shared: Strategy · Grand Strategy · Simulation

Sid Meier's Civilization VII
Shared: Strategy · Grand Strategy · Simulation

Heroes' Vow: Three Kingdoms
Shared: Simulation · Strategy · Grand Strategy

Imperator: Rome
Shared: Strategy · Simulation · Grand Strategy

Crusader Kings II
Shared: Strategy · Grand Strategy · Simulation

Kingdom Heroes 8
Shared: Strategy · War · Wargame

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

Crusader Kings III
Shared: Strategy · Simulation · Grand Strategy

Total War: WARHAMMER
Shared: Strategy · Simulation · Grand Strategy

WARNO
Shared: Wargame · Strategy · Real Time Tactics

Terra Invicta
Shared: Simulation · Strategy · Grand Strategy

Wargame: Red Dragon
Shared: Strategy · Wargame · Simulation

Sid Meier’s Civilization® VI
Shared: Strategy · Grand Strategy · Simulation

ROMANCE OF THE THREE KINGDOMS XIV
Shared: Wargame · War · Grand Strategy

Rebel Inc: Escalation
Shared: Simulation · Strategy · Grand Strategy

Total War: ROME II - Emperor Edition
Shared: Strategy · Grand Strategy · War

Master of Command
Shared: Strategy · War · Wargame