A summary of what was mentioned here

There’s a new game called "//signal." It’s an occult RPG based on the famous Japanese anime "serial experiments lain." The game is officially licensed by NBCユニバーサル, and it will be released on April 30, 2025 on Steam and itch.io for 1,000 yen (around $7 USD), with a limited physical version priced at 1,700 yen.

In the game, players interact with characters from the anime, such as 岩倉玲音 (Iwakura Rei) and lain, and collect old logs to rebuild lost connections. As the game progresses, players will uncover new sides of the characters and learn the reasons behind the lost bonds. If you’re a fan of the anime, this game will be a great opportunity to explore more of the serial experiments lain world

https://www.reddit.com/r/Lain/comments/1jchebf/comment/mi2b6av/

I'm still waiting to see how the gray aliens are involved on the Lain thing. I would chuckle if it was a mundane like internet first server was made out of parts of an UFO.