Games like YORG.io 3
Games like YORG.io 3 include Bloons TD 6, Plants vs. Zombies GOTY Edition, Plague Inc: Evolved, Age of Empires II (Retired), and Age of Empires III: Definitive Edition. We matched them by the tags players give YORG.io 3 on Steam (Strategy, Casual, Tower Defense, Indie, and Multiplayer): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Multiplayer

Plants vs. Zombies GOTY Edition
Shared: Strategy · Tower Defense · Casual

Plague Inc: Evolved
Shared: Strategy · Indie · Casual

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

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

Mount & Blade II: Bannerlord
Shared: Strategy · Open World · Multiplayer

Anno 1800
Shared: Strategy · City Builder · Multiplayer

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

Cossacks 3
Shared: Strategy · Multiplayer · RTS

Factorio
Shared: Strategy · Multiplayer · Open World

Castle Story
Shared: Strategy · Multiplayer · Indie

They Are Billions
Shared: Strategy · Tower Defense · RTS

Kingdom Two Crowns
Shared: Tower Defense · Strategy · City Builder

Warstone TD
Shared: Strategy · Tower Defense · Indie

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · Strategy · Multiplayer

Where Winds Meet
Shared: Open World · Multiplayer · Strategy

Mini Motorways
Shared: Strategy · Casual · Indie

Age of Empires: Definitive Edition
Shared: Strategy · Multiplayer · RTS

Dawn of Man
Shared: Strategy · City Builder · Open World

Project Zomboid
Shared: Multiplayer · Open World · Indie

Don't Starve Together
Shared: Multiplayer · Open World · Indie

Company of Heroes 2
Shared: Strategy · Multiplayer · RTS

Circle Empires
Shared: Strategy · Casual · Indie

Bloons TD 5
Shared: Strategy · Tower Defense · Casual