Games like O.A.C - World Begins
Games like O.A.C - World Begins include Victoria 3, Europa Universalis IV, Crusader Kings II, Crusader Kings III, and Europa Universalis V. We matched them by the tags players give O.A.C - World Begins on Steam (Strategy, Historical, Grand Strategy, Political Sim, and Diplomacy): closest matches first, and among equally close ones the better-known games.

Victoria 3
Shared: Strategy · Grand Strategy · Historical

Europa Universalis IV
Shared: Strategy · Grand Strategy · Historical

Crusader Kings II
Shared: Strategy · Grand Strategy · Historical

Crusader Kings III
Shared: Strategy · Grand Strategy · Historical

Europa Universalis V
Shared: Strategy · Grand Strategy · Historical

Manor Lords
Shared: Strategy · Grand Strategy · Historical

Victoria II
Shared: Strategy · Grand Strategy · Historical

Imperator: Rome
Shared: Strategy · Grand Strategy · Historical

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

Democracy 4
Shared: Strategy · Political Sim · Grand Strategy

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

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

Workers & Resources: Soviet Republic
Shared: Strategy · Grand Strategy · Historical

Against the Storm
Shared: Strategy · Grand Strategy · Historical

Terra Invicta
Shared: Strategy · Grand Strategy · Historical

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

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

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

Empires of the Undergrowth
Shared: Strategy · Grand Strategy · Historical

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

Crisis in the Kremlin
Shared: Strategy · Political Sim · Historical

Power & Revolution 2020 Edition
Shared: Strategy · Grand Strategy · Diplomacy

Old World
Shared: Strategy · Grand Strategy · Historical

Norland
Shared: Strategy · Grand Strategy · Historical