Games like End War RTS 2
Games like End War RTS 2 include Terraria, From the Depths, Stardew Valley, Garry's Mod, and Bloons TD 6. We matched them by the tags players give End War RTS 2 on Steam (RTS, Sandbox, Indie, War, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Terraria
Shared: Sandbox · Multiplayer · Pixel Graphics

From the Depths
Shared: Sandbox · RTS · Vehicular Combat

Stardew Valley
Shared: Multiplayer · Pixel Graphics · Sandbox

Garry's Mod
Shared: Sandbox · Multiplayer · Singleplayer

Bloons TD 6
Shared: Multiplayer · Co-op · Singleplayer

Company of Heroes 2
Shared: RTS · Multiplayer · War

Mount & Blade II: Bannerlord
Shared: Sandbox · War · Multiplayer

Planetary Annihilation: TITANS
Shared: RTS · Multiplayer · War

Halo Wars: Definitive Edition
Shared: RTS · Multiplayer · War

Rusted Warfare - RTS
Shared: RTS · Indie · Sandbox

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

Teardown
Shared: Sandbox · Multiplayer · Indie

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

Totally Accurate Battle Simulator
Shared: Sandbox · War · Indie

The Escapists 2
Shared: Multiplayer · Co-op · Pixel Graphics

Hearts of Iron IV
Shared: War · Multiplayer · RTS

Call to Arms
Shared: RTS · War · Multiplayer

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

Company of Heroes
Shared: RTS · War · Multiplayer

Men of War: Assault Squad 2
Shared: RTS · War · Multiplayer

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

Human Fall Flat
Shared: Co-op · Sandbox · Multiplayer

Warhammer 40,000: Space Marine 2
Shared: Co-op · Multiplayer · Action

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