Fiesta Series 4 is a European Counter-Strike 2 tournament featuring 24 teams competing for a $20,000 prize pool from November 17 to 29, 2026.

Tournament Format

Closed Qualifier will be played in a four-double-elimination (GSL) format, and all matches are best-of-three series.

Play-In Stage will be played in a single-elimination bracket, and all matches are best-of-three series.

The Main Stage will be played in a Swiss System format, with all matches to best of three.

Playoffs will be played in a single-elimination bracket, and all matches are best-of-three series.