Rainbow Six Siege launched on December 1, 2015. This tactical shooter from Ubisoft quickly became a multiplayer phenomenon, drawing millions with its intense 5v5 matches and destructible environments.

Release Platforms

Originally available on PC, PlayStation 4, and Xbox One, the game marked a bold shift from the Rainbow Six series' single-player roots.

Next-gen versions hit PS5 and Xbox Series X/S exactly five years later on December 1, 2020, with free upgrades for prior owners.

It later expanded to Amazon Luna in January 2022, keeping its live-service model alive.

Development Backstory

Siege wasn't always the plan—Ubisoft pivoted from a canceled project called Rainbow Six: Patriots , announced in 2011 amid next-gen console uncertainty.

The focus turned to multiplayer destruction and operator-based tactics, inspired by real-world counter-terrorism, which helped it endure over a decade.

By March 2026, it's still thriving: player counts are up across platforms, esports scenes are healthy (e.g., Cloud9's return), and Rainbow Six Siege X was teased in February 2025 as a major evolution, not a sequel.

Other "Siege" References

  • Marvel Comics : Siege (2010) wrapped the "Dark Reign" arc with Norman Osborn assaulting Asgard—pure superhero chaos from January to May.
  • 1992 Game : Mindcraft's Siege was an MS-DOS strategy title with castle battles and an expansion, Dogs of War.

Context| Release Date| Type
---|---|---
Rainbow Six Siege| Dec 1, 2015| Video Game 13
Marvel Siege Comics| Jan-May 2010| Comic Series 2
Original Siege Game| 1992| Strategy Game 5

TL;DR: Most likely referring to Rainbow Six Siege, out since December 1, 2015—still dominating shooters in 2026.

Information gathered from public forums or data available on the internet and portrayed here.