Backstab Gaming Protocols is a PvP variant of Invisible, Inc. which can be played either between two players as a one-shot game, or in a knockout tournament format. The rules can be found here.

Backstab Gaming Protocols was invented in 2021 in order to run a tournament celebrating the 6th anniversary of Invisible, Inc.'s release. The tournament was played between May 8th and May 17th, 2021, with six players participating:

• MaDmAN12345, as Internationale and Archive Nika
• TornadoFive, as Decker and Prism
• jlaub, as Olivia and Archive Dr. Xu
• qoalaty_engineering, as Banks and Monst3r
• chistosoloco, as Draco and Dr. Xu
• DatsDaBeat, as Derek and Rush

The tournament was hosted by Andrew Kay and streamed live. Recordings of the games can be found on YouTube.

• chistosoloco (winner) vs. MaDmAN12345 — Watch on YouTube
• jlaub (winner) vs. qoalaty_engineering — Watch on YouTube
• TornadoFive vs. DatsDaBeat (winner) — Watch on YouTube

• chistosoloco vs. jlaub (both lost) — Watch on YouTube
• DatsDaBeat vs. MaDmAN12345 (both lost) — Watch on YouTube
• qoalaty_engineering vs. TornadoFive (winner) — Watch on YouTube

• chistosoloco (winner) vs. DatsDaBeat — Watch on YouTube
• jlaub (winner) vs. TornadoFive — Watch on YouTube

• chistosoloco (winner) vs. jlaub — Part 1, Part 2, Part 3

As the winner of the tournament, chistosoloco was crowned as the backstabbest Invisible, Inc. player of them all, and the Least Trustworthy.