MIBR was founded on March 1, 2003, in the city of Rio de Janeiro, when the Brazilian businessman Paulo Velloso decided to invest in his son's dream.

On August 3, 2019, the Immortals Tom Clancy's Rainbow Six: Siege lineup was transferred to the MIBR name days before the Six Major Raleigh 2019.

[3] In September 2020, CSGO coach Ricardo "dead" Sinigaglia was banned from nearly all notable tournaments (those organized by ESL, DreamHack, BLAST Premier, Eden Esports, and Beyond The Summit) following a ban by the Esports Integrity Commission (ESIC) for abusing a bug allowing him to get an advantage over a competing team as a coach.

The same day, Gabriel "FalleN" Toledo announced his self-benching from the active MIBR lineup after stating his dissatisfaction with the organization's decision to remove fer and TACO.

This left only kNgV and trk remaining on the active lineup, the two newest members of the team.