Games like RealmCraft
Games like RealmCraft include Terraria, House Flipper, The Escapists, Garry's Mod, and Totally Accurate Battle Simulator. We matched them by the tags players give RealmCraft on Steam (Casual, Adventure, Simulation, Strategy, and Sandbox): closest matches first, and among equally close ones the better-known games.
Terraria
Shared: Sandbox · Adventure · Pixel Graphics
House Flipper
Shared: Simulation · Singleplayer · Casual
The Escapists
Shared: Strategy · Simulation · Singleplayer
Garry's Mod
Shared: Sandbox · Casual · Simulation
Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Strategy
Stardew Valley
Shared: Simulation · Pixel Graphics · Sandbox
Don't Starve
Shared: Adventure · Sandbox · Singleplayer
Starbound
Shared: Adventure · Sandbox · Pixel Graphics
Rust
Shared: Adventure · Sandbox · Crafting
The Forest
Shared: Adventure · Survival · Crafting
Mount & Blade II: Bannerlord
Shared: Strategy · Sandbox · Singleplayer
Planet Coaster
Shared: Simulation · Sandbox · Strategy
Forager
Shared: Adventure · Pixel Graphics · Sandbox
Don't Starve Together
Shared: Adventure · Sandbox · Survival
Scrap Mechanic
Shared: Sandbox · Building · Adventure
Graveyard Keeper
Shared: Simulation · Sandbox · Pixel Graphics
Conan Exiles Enhanced
Shared: Sandbox · Adventure · Building
Plague Inc: Evolved
Shared: Simulation · Strategy · Casual
Once Human
Shared: Action · Adventure · Survival
Portal Knights
Shared: Adventure · Sandbox · Building
Cities: Skylines
Shared: Simulation · Strategy · Sandbox
Raft
Shared: Adventure · Survival · Sandbox
DAVE THE DIVER
Shared: Casual · Adventure · Pixel Graphics
The Scroll of Taiwu : Beyond The Dome
Shared: Sandbox · Strategy · Adventure