Time to describe a game I'd like to play as exactly as possible!
Lots of people like to play multiplayer games with friends as a way to hang out. So this is intended to be a game played with friends where there's not much pressure, and you also get the pleasure of hoovering up loot. Concept came to me while talking to twitch chat, I don't think there are any games like this where you're not constantly fighting enemies or something.
The setup is that you're a scavenger going through an abandoned, alien city. You left earth on a spacecraft because it became unliveable and went to the nearest inhabited system. When you got there, you found that the people who lived there left too, for the exact same reason you did.
Either alone or with a group of friends, you descend from your ship in orbit on a lander which also holds a wheeled vehicle of some sort, which you can use to get around quickly and to stow your loot when your inventory gets full. The vehicle has a storage capacity of its own, so when it gets full you have to head back.
For 2 minutes every 10 minutes, your orbiting ship passes overhead and you're able to fly back to it. If you miss your window, you'll just have to wait for it to come back. This would give a little bit of time pressure, but you don't actually lose anything if you're late, you just have to wait longer.
As for actually playing, you're walking around in first-person, picking up materials and technological doodads, using tools like scanners or diggers to find more loot, and avoiding hazards. There's no enemies or really active danger and even if you get yourself in trouble nothing should be able to kill you instantly, but if you do die you don't respawn in the same expedition. Generally danger is something you either have to come to, or something you cause yourself, like by cutting down the support beams of the building you're in.
The environment is procedurally generated from blocks and destructible, especially using upgraded tools. Hazards are things like radiation or extreme heat and could be braved with suit upgrades. Some places are dark, making you watch your flashlight battery, or underwater, making you watch your oxygen supply.
Once you've returned to your ship with your loot, you can use it to upgrade your ship, lander, vehicle, suit, and tools. Lander upgrades let you access more areas and increases the window of time where you can return to orbit, vehicle upgrades increase how much storage it has and how well it can navigate terrain, suit upgrades let you survive in hazardous areas for longer, and give you more inventory space. Tool upgrades do lots of things, like scan for valuable loot, cut through walls, dig for artifacts in the ground, or set up ziplines to get around easier.