Games like The RPG Engine
Games like The RPG Engine include 60 Seconds!, 鬼谷八荒 Tale of Immortal, The Sims™ 4, Disney Dreamlight Valley, and 60 Seconds! Reatomized. We matched them by the tags players give The RPG Engine on Steam (Tabletop, Choose Your Own Adventure, Sandbox, Building, and Exploration): closest matches first, and among equally close ones the better-known games.

60 Seconds!
Shared: Choose Your Own Adventure · Turn-Based Tactics · Exploration

鬼谷八荒 Tale of Immortal
Shared: Sandbox · Choose Your Own Adventure · RPG

The Sims™ 4
Shared: Building · Sandbox · Character Customization

Disney Dreamlight Valley
Shared: Exploration · Sandbox · Character Customization

60 Seconds! Reatomized
Shared: Choose Your Own Adventure · Turn-Based Tactics · Exploration

Kenshi
Shared: Sandbox · Immersive Sim · RPG

Avorion
Shared: Sandbox · Exploration · Building

Terraria
Shared: Sandbox · Building · Exploration

Out of Ore
Shared: Sandbox · Exploration · Choose Your Own Adventure

Breakout 13
Shared: Choose Your Own Adventure · Exploration · Interactive Fiction

Mon Bazou
Shared: Sandbox · Choose Your Own Adventure · Exploration

Stormworks: Build and Rescue
Shared: Sandbox · Building · Immersive Sim

Anno 117: Pax Romana
Shared: Sandbox · Building · Choose Your Own Adventure

Planet Coaster
Shared: Building · Sandbox · Simulation

House Flipper
Shared: Building · Sandbox · Simulation

PC Building Simulator
Shared: Building · Sandbox · Immersive Sim

The Sims™ 3
Shared: Building · Sandbox · Character Customization

Portal Knights
Shared: Sandbox · Building · Exploration

School Days
Shared: Choose Your Own Adventure · Exploration · Immersive Sim

TaleSpire
Shared: Tabletop · Building · Sandbox

Conan Exiles Enhanced
Shared: Building · Sandbox · RPG

Dune: Awakening
Shared: Exploration · Sandbox · Adventure

Kerbal Space Program 2
Shared: Sandbox · Building · Exploration

7 Days to Die
Shared: Building · Sandbox · Exploration