十三怪談 -メッセージアプリ風ゲーム- is a horror game for Android devices developed by G.Gear.inc. In this game, you receive a cursed email that states if you don't forward it to 13 people within 3 days, something unfortunate will happen to the 13 people you know. As you dismiss it as a prank, you soon receive a message from a friend asking for help. The game features various scenarios based on urban legends, ghost stories, and fairy tales, each involving strange and supernatural events that happen to the 13 people. You are their only hope, as you must reply to each person and guide them to safety. Can you save them?

The game includes scenarios such as "Kotoribako x Merry-san," where opening a beautiful wooden box leads to unexpected consequences, and "Daruma-san ga Koronda," where imagining a certain word while taking a bath brings about a strange occurrence. With a total of 13 scenarios, this game offers a thrilling and suspenseful experience for horror enthusiasts, fans of urban legends, and those who enjoy solving mysteries.