Narrative-driven exploration game Gone Home (opens in new tab), which is still one of the best indie games on PC (opens in new tab), is free on the Humble Bundle right now.
Gone Home is one of the 60+ titles in the Humble Monthly Trove, a bank of games that are available to all Humble Monthly (opens in new tab) subscribers. Occasionally, one of these games gets given away free for a limited time, and Gone Home's number has been called—you can download it here until May 5 (opens in new tab).
You'll need to login to your Humble Bundle account first, but after that you'll get a DRM-free copy of the game, meaning you'll be able to launch it directly from your desktop rather than going through a launcher.
In Gone Home, you explore a detailed house to learn about the lives of the people that lived there. It's more than five years old, but it's still worth playing because of its touching story: you can read our review from the time here (opens in new tab).