Founded in 2015 and organized by Riot Games Oceania, the league had eight teams.

Matches were live streamed on Twitch and YouTube, the latter having on-demand-video archives for the OPL and the lower division Oceanic Challenger Series (OCS).

Riot Games announced the dissolution of the OPL on 7 October 2020, citing operation costs and failures to reach company-set goals.

It was also announced that players with Oceanic residency would be allowed to participate in North America's LCS without filling an import slot.

[1] ESL Australia announced on 18 December 2020 that they would be creating a new professional league for Oceania in 2021 to replace the OPL.