Cancel whatever plans you had for the rest of today.

The Internet Archive, a non-profit best known for backing up web pages, has added a collection of 900 video games from the 1970s to 1990s that can be played in your web browser — no coins required.

Called the Internet Arcade, the collection includes familiar games such as Astro Invader and Pac Man, as well as more obscure titles from that era. Most include detailed background histories and links to play in the browser.

Some of the games we tested were a bit clunky to play, but, remember, it's free and hopefully it gets better in time.

"The game collection ranges from early 'bronze-age' videogames, with black-and-white screens and simple sounds, through to large-scale games containing digitized voices, images and music," according to the site's description. "Most games are playable in some form, although some are useful more for verification of behavior or programming due to the intensity and requirements of their systems."

A selection of the games available on the Internet Arcade Image: Internet Arcade/Associated Press

Jason Scott, the archivist who helped put together the collection of games, wrote on Saturday that the project took "months of testing, refinement, improvements and efforts." But apparently that work has already been paying off.

Apparently people are now hitting the Internet Arcade at twice the rate of the front page of http://t.co/pvwAEWjDMR so congrats on that. — Jason Scott (@textfiles) November 2, 2014

At the end of last year, the Internet Archive opened up a collection of console video games from the 1970s and 1980s.