Voices of the Void has been my go to time waster for a couple years now. Dev is a little weird, but the game is amazingly well done and gets somewhat regular updates that expand the story and add new content. You are essentially a scientist sent to work at a SETI-like site in Switzerland. Your job is to maintain the site and search for signals in space, analyze them, and then ship them out to your colleagues, for which you get paid to buy supplies and other things. As you play, random events occur, some funny, some scary. There's tons of items to buy and decorate your base with. Lots of locations to discover. Sooooooo many secrets to find. I'm constantly impressed by all the work they've done with a very small team.
My only complaint is having to reset my save when an update comes out. It's generally worth it, as there's usually new events that you'll miss otherwise, but having to redecorate the base and lose collectables you've spent hours on is a bummer... That and I hate the new drive storage rack. I wish they'd bring back then old one as an additional storage item.
Also, the whole damn game is free.