Hytale

Hytale is a sandbox RPG built around procedurally generated worlds where you explore dungeons, climb towers, and gather resources. Construction works block-by-block—you can build structures from scratch or script custom minigames using the game's toolset. Exploration feeds into progression: dungeons and towers drop gear and materials that tie into RPG mechanics. The world generates with biomes, NPCs, and combat encounters. After launch, the developers plan to release story content in chapters during early access. Tools let you modify the game extensively, from tweaking mechanics to creating entirely new game modes. If you want open-ended building mixed with dungeon crawling and character progression, this covers both angles.