If you aren’t up to date on Humble Bundle, they recently put out an exceedingly humble bundle. If you chip in $30 dollars, you can get 27 various games in their Humble Care Package Bundle. It’s got some rather high-quality titles, such as Stardew Valley, Darkest Dungeon, Psychonauts, Pony Island, and Her Story (just to name a few). As an added bonus, 100% of the money spent goes towards charities like the American Red Cross or Doctors Without Borders, so you’re basically doing secondhand charity. I highly recommend checking it out, even if only a small portion of the games interest you. You’ve still got over 4 days to decide, so give it some thought.
Or just get killer is dead: Nightmare edition for free if you don’t have 30$ on hand.