Over the past few years, the gaming portal Itch.io has been making a name for itself as the indie antithesis to Steam. There are no barriers to entry for game developers, unlike with Valve's storefront. Additional features, such as the ability to tip creators, has turned Itch.io into a breeding ground for games that are off the beaten path. Spending a few hours on the site (or in its PC app) is a fine way to expand your sense of what games can do.
To get you started, here are a dozen of the best, weirdest, or just plain interesting indie games—both free and paid—that you'll find on Itch.io, but not on Steam.