The 2025 Prime League 1st Division Summer is an online League of Legends tournament organized by Riot Games featuring ten notable teams from Germany. It is the highest tier of the German ERL circuit.

Tournament Format

Group Stage will be played in a double round-robin format, All matches are best-of-one series. The top 6 teams from the group will advance to the playoffs.

Playoffs will be played in a double-elimination format, and all matches are played in a best-of-five series.