Challenger is a free theme for WordPress created by Ben Sibley.
Challenger is a premium-quality theme for modern blogs, podcasts, and vloggers. As a fully responsive theme, your website will look awesome on laptops, tablets, and mobile devices. The design is simple and minimalist with special attention paid to the typography for maximum readability. The free Challenger theme includes a diverse feature set including 4 widget areas, 50+ social media icons, and a completely customizable header section for email list building. Use it for a business, niche news magazine, or professional blog. Challenger is also fully compatible with the new Gutenberg post editor. View the fully setup live demo here https//www.competethemes.com/demos/?theme=Challenger
(Description "Challenger" Theme from wordpress.org)
You can download Challenger for free via the provided download link and include it into your themes folder of your WordPress installation. Also you can directly search for it in the WordPress admin interface in the themes section and install and activate it from there.
More information, screenshots and reviews of Challenger Theme can be found here.