"Backstabbed in a Backwater Dungeon: My Party Tried to Kill Me, But Thanks to an Infinite Gacha I Got LVL 9999 Friends and Am Out for Revenge", known as "Shinjiteita Nakama-tachi ni Dungeon Okuchi de Korosarekaketa ga Gift "Mugen Gacha" de Level 9999 no Nakama-tachi wo Te ni Irete Moto Party Member to Sekai ni Fukushuu & "Zamaa!" Shimasu!" in Kapanese, is a light novel series written by Meikyou Shisui and illustrated by tef.
The series started serialization on the online platform Shōsetsuka ni Narō in April 2020 and manga by Seven Seas Entertainment An anime adaptation has been announced. Premiere in Q4 2025 by J.C.Staff
Its main character summons overpowered characters via a gacha mechanic to get revenge on his previous party composed entirely of nonhumans.
