So... I spam played RUST and will probably do so some more. Really enjoying my time. Here's a quick run down on the game, what you do, what's good, what's awful.
So, you start out recovering from being unconscious on a beach. You have a rock and a torch and are naked as a jaybird. You are injured, hungry and thirsty. Survive.
So, you find some wild mushrooms to eat. Chop down some wood and stones. Immediately you make a spear to protect yourself. You make a crude hammer and pickaxe from the wood and stones. Now you can more quickly harvest wood/stone and you start to have a little more security. Did I mention, if you die, you lose all your crap and spawn at a random location on the map? Eventually you get enough tech and wood to build a house after you find an ok spot for it. You build small because you need to get a shelter in place ASAP. You build a furnace in your house and use it to melt down some ore you found when you were mining the stones. You build a sleeping bag (which is a spawn point in the game) and place it in your house. You create a lock and key and call it a night. Your house is still really weak and could be broken into, but its all you could do.
Anyway, there's a bunch of progression. You explore and build a proper base in a better spot, you hunt, you find spots with blueprints of guns etc and build them. You group up with folks if you can find some that don't try to kill you.
Onto the bad stuff - folks say the community is straight awful. Like camping spawn points and shooting you, taking all your crap, and verbally taunting you while they do it. So, you literally can show up naked with a rock and a torch and a guy with a machine gun levels you. Or an organized group appears with c4, destroys your house, kills you and takes all your stuff that you invested hours into.
I chose a very low population server to try things out so I haven't run into many people, which I really like while I'm learning the game. I find it really enjoyable overall.
Still $10 - give it a try if you want and I'll let you know what server I'm on, etc. They have a nice system where you can have your pals spawn in your base so its easier to get going if you are already established. Games seeing updates weekly and I guess they are working on a level up progression system. Its fun as is imo.