The annual Independent Games Festival has taken on the role of highlighting the best indie games each year, from critics to student projects. Now, Steam has partnered with IGF and indie publisher Crunching Koalas to offer this year's and past IGF winners at discounted prices in a sale called IGF Celebration Days, which runs through July 20.

That means you can get Sam Barlow and Half Mermaid's brain-bending cinemaphile puzzle game Immortality for 50% off, the lowest price ever. Or you can fill in the blanks in your library with Barlow's previous award-winning title, "Her Story," which is currently 90% off. This year's well-received sci-fi clone saga "1000xResist" is 10% off, and a bundle containing all three Night School talk adventures "Oxenfree," "Oxenfree 2," and "Afterparty" is on sale for 60% off. Other highlights of the sale include.

In addition to the discounts, IGF Celebration Days will also feature video developer talks, trailers, and live streams, highlighting upcoming games from IGF-winning developers and pubs, including "Sorry We're Closed," Sumerian Six, and Mythwrecked: demos of games such as Ambrosia Island are available for download.