Games like 4th Generation Warfare
Games like 4th Generation Warfare include Europa Universalis IV, Europa Universalis V, Total War: WARHAMMER, Crusader Kings II, and Total War: WARHAMMER II. We matched them by the tags players give 4th Generation Warfare on Steam (RTS, Diplomacy, Wargame, 4X, and Hacking): closest matches first, and among equally close ones the better-known games.

Europa Universalis IV
Shared: Grand Strategy · 4X · Wargame

Europa Universalis V
Shared: Grand Strategy · Wargame · Diplomacy

Total War: WARHAMMER
Shared: 4X · RTS · Grand Strategy

Crusader Kings II
Shared: Grand Strategy · Diplomacy · Strategy

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

Age of History 3
Shared: Wargame · RTS · Diplomacy

Sins of a Solar Empire®: Rebellion
Shared: Diplomacy · RTS · Singleplayer

Sid Meier’s Civilization® VI
Shared: Grand Strategy · 4X · Strategy

Company of Heroes 3
Shared: RTS · Wargame · Singleplayer

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

Total War: ROME REMASTERED
Shared: RTS · Grand Strategy · 4X

Sid Meier's Civilization® V
Shared: 4X · Strategy · Multiplayer

Sid Meier's Civilization VII
Shared: Grand Strategy · 4X · Diplomacy

Stellaris
Shared: 4X · Grand Strategy · Strategy

Dune: Spice Wars
Shared: RTS · Singleplayer · 4X

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

Heroes of Might and Magic: Olden Era
Shared: Grand Strategy · 4X · Strategy

Knights of Honor II: Sovereign
Shared: RTS · Grand Strategy · Strategy

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

Steel Division 2
Shared: RTS · Strategy · Singleplayer

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

Sins of a Solar Empire II
Shared: RTS · 4X · Singleplayer

Old World
Shared: 4X · Grand Strategy · Strategy

Crusader Kings III
Shared: Grand Strategy · Strategy · RTS