The offline qualifier consists of 5 rounds. Every team keeps playing until they are either qualified (after 3 wins) or eliminated (after 3 losses). All matches played in the qualifier will be best of one.
After the first round, every round each team is randomly matched against a team with the same number of wins that they have not played against before.
Teams are placed into four seeding pools based on how they qualified for the Offline Qualifier. The first round matches were drawn to match Pool 1 vs Pool 3 and Pool 2 vs Pool 4.
The following rules apply at the end of the tournament to decide the final ranking of the top 8 teams that qualify for ESL One Cologne: