Didn't see a topic on this so I started one.
"The only aim in Rust is to survive."
It is a survival game like DayZ. Post apocalyptic setting with no zombies. Servers can hold about 50-200 players and can be moded. It has a crafting system. You start with some basic recipes. The rest of the recipes are dropped or you use a research kit on an item to learn its recipe. Of course, there is structure building.... where else would you live?
Its on steam early access right now for 19.99. Might be able to fill a little of that AA void.
Forgot to add. The guy that made Gary's Mod is the one making Rust.