Dead by Daylight is a multiplayer horror game where one player gets to mess around as a monstrous killer, while four others have to their their very best to not become a colorful stain on the living room carpet. If the general idea behind this reminds you of Left 4 Dead, you might be glad to hear that good ol' Bill is one of the playable characters, though I can't imagine that being very fair to the killer given how much experience Bill has in being an overly grumpy badass.
If all of this sounds like something you might enjoy, but you're not sure if you really want to buy it, you're in luck as Steam is currently holding a free weekend. All you need to do is head over to Dead by Daylight's Steam Store page, click that giant green "Play Game" button, and for the next three days you'll be able to explore everything it has to offer.
As is tradition, the free weekend is also accompanied by a 50% discount, bringing the price down to €10. Unfortunately, the sale will end on pretty much the same date as the free weekend, so you're going to have to decide quickly whether you want to grab it or not. That said, I hope you have fun, and here's the launch trailer to set the mood: