I usually think of games that let you experiment freely without strict progression rules. Haunted Dorm isn’t a pure sandbox, but it does give that experimental feel once you’re comfortable with the mechanics. You can try different defense setups, test traps, and adjust strategies depending on the ghosts you face, which scratches a similar itch. I was reading a detailed breakdown of the modded version recently, and it explains how the extra resources make experimenting easier without grinding. If anyone’s curious, this page covers it clearly https://haunteddormapks.com/.