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 11th, 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 AndrewKay and streamed live. Recordings of the games can be found on YouTube.

• chistosoloco (winner) vs. MaDmAN12345
• jlaub (winner) vs. qoalaty_engineering
• TornadoFive vs. DatsDaBeat (winner)

• chistosoloco vs. jlaub (both lost)
• DatsDaBeat vs. MaDmAN12345 (both lost)
• qoalaty_engineering vs. TornadoFive (winner)

• chistosoloco (winner) vs. DatsDaBeat
• jlaub (winner) vs. TornadoFive

• chistosoloco (winner) vs. jlaub

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