[3] Stack's headquarters are located in the Sugishō Building (杉商ビル) in Kanda, Chiyoda, Tokyo.

[2] Overflow's PureMail video game was adapted into a two-episode OAV in 2001.

Overflow's School Days video game was adapted into a 12-episode anime series in 2007.

The video game also received an anime film titled Welcome to Pia Carrot!!

[3] Customers were told that the company would continue to support their line of video games.