I ran a search and didn’t find a thread for this, much to my surprise.
Minecraft. You can play the classic (older version) for free or purchase the development version in that payment model that’s become surprisingly common lately (pay a little now for alpha, or more when the full thing comes out).
The game’s very charming visually, being made solely of pixelly blocks. You start out with nothing but your punching fists, with which you can dig up dirt or chop down trees. Every material you make a tool out of lets you get resources from one material higher in quality (wood pickaxe lets you get stone, stone pickaxe lets you get iron, etc, more or less), and there are “recipes” in the game that actually resemble the tools you end up making.
I haven’t delved very deeply into it yet, but I did get killed by a skeleton archer at night, so I am suspecting that building some sort of defenses will be vital at some point. I already have a small cave dug out, with a door preventing entry, a work bench and a furnace.
Anyway, I posted this to ask a question of those playing - how do you use a furnace? I built it, I stuck some coal in the smelty bit and some ore (or at least I think it’s ore, a little hard to say, but it certainly has flecks in it of some sort) in the top part, and nothing happens, it just sits there. When I used a stick earlier I got it to light but I’m not sure what I did and I can’t get it to happen again …