https://www.pcgamer.com/portal-after-hours-mod-to-launch-first-episode-next-month/

After writing about the 20-map, 30-puzzle-boasting Destroyed Aperture earlier this month, I've had a hankering for Portal 2 mods. After a wee fumble around ModDB, the latest to catch my eye is Portal: After Hours—a " one man passion project" that plans to launch its first episode on August 15, 2018. 

Designed to recapture the story-lite "simplicity" of the original Portal, After Hours aims to give players "much harder puzzles that cater to long-term Portal fans first," so says creator ABNTGeneric.