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Blue Protocol: Star Resonance Celebrates Its First Anniversary With Season 4 and Slime Collaboration

Blue Protocol: Star Resonance celebrates its first anniversary with Season 4: Lightchase Oath, while A PLUS JAPAN confirms an upcoming crossover with That Time I Got Reincarnated as a Slime.

Season 4: Lightchase Oath arrives alongside the first-anniversary celebrations for Blue Protocol: Star Resonance. Image: A PLUS JAPAN. Use the publisher-supplied press asset and its accompanying copyright notice for publication.

Key Takeaways

A PLUS JAPAN has confirmed an upcoming collaboration between Blue Protocol: Star Resonance and That Time I Got Reincarnated as a Slime, with further details still to come.
Season 4: Lightchase Oath launches October 9, 2026, alongside first-anniversary events and the Seabreeze Festival.
The update introduces Montegnor Valley, new dungeons and Chaotic Realms, mini-games, and changes to the Talents and Psychoscope progression systems.

Blue Protocol: Star Resonance is celebrating its first anniversary with the launch of Season 4: Lightchase Oath, and publisher A PLUS JAPAN has confirmed that a collaboration with That Time I Got Reincarnated as a Slime is on the way.

The announcement, shared with Morganyte in an October 9 press release, coincides with the game's first anniversary. Season 4 introduces new locations, story content, dungeons, and character progression changes, alongside the limited-time Seabreeze Festival celebration.

The upcoming anime crossover is a separate announcement, with more information expected at a later date.

That Time I Got Reincarnated as a Slime collaboration confirmed

Blue Protocol: Star Resonance has confirmed an upcoming collaboration with That Time I Got Reincarnated as a Slime. Use only an officially supplied crossover image, if one was included in the press kit. The anime copyright notice supplied with the release is © Taiki Kawakami, Fuse, KODANSHA/“Ten-Sura” Project.

A PLUS JAPAN confirmed that Blue Protocol: Star Resonance will collaborate with That Time I Got Reincarnated as a Slime, the popular fantasy series starring Rimuru Tempest.

The publisher has not yet revealed when the collaboration will begin or what content it will introduce. There are currently no confirmed details about playable characters, costumes, special quests, or crossover rewards.

For now, the announcement establishes that the two franchises will come together in a future update.

Players can follow the game's official website and X account for further announcements.

Season 4: Lightchase Oath introduces new regions and challenges

Montegnor Valley is one of the new areas introduced with Season 4: Lightchase Oath. Image courtesy of A PLUS JAPAN. Use the publisher's original asset and verified copyright notice.

Season 4 expands the world of Regnus with a new story centered on Montegnor Valley.

The region introduces new characters and environments for players to explore, while the update also adds fresh dungeons and Chaotic Realm challenges.

According to the game's official Season 4 schedule, players can expect several dungeon releases throughout October, beginning with Mirror Judgment and continuing with additional encounters such as Barren Courtyard and Cavern Zero.

The update also introduces new game modes and mini-games, giving players more activities beyond the main story and combat progression.

Character development is receiving changes as well. The Talents and Psychoscope systems have been upgraded, offering additional ways to customize builds and strengthen characters.

Season 4's Oath Psychoscope introduces new Factor effects, while the updated class Talents system incorporates effects from earlier seasons.

The developers are also adjusting certain weekly activities to reduce the time required for progression, including changes to Chaotic Realm and raid difficulty.

First-anniversary events bring the Seabreeze Festival

The first-anniversary celebration includes the Seabreeze Festival, which features limited-time activities and commemorative rewards.

Players can participate in Stellar Paths by completing eligible activities to accumulate Star Traces and earn rewards. The event also includes anniversary-themed collectibles and progression materials.

Starlight Fireworks will take place on weekends during the celebration, while Fireworks Trivia gives players another way to revisit the game's first year.

According to the official event calendar, the Seabreeze Festival activities run through November 23, although individual events may follow different schedules.

Anniversary login rewards are also available, alongside seasonal events and new customization items.

Blue Protocol: Star Resonance enters its second year

Originally released internationally on October 9, 2025, Blue Protocol: Star Resonance is a free-to-play MMORPG set in the world of Regnus.

The game is developed by Shanghai Bokura Network Technology and published by A PLUS JAPAN, offering an anime-inspired multiplayer adventure built around exploration, character progression, and cooperative combat.

Season 4 marks the beginning of its second year with additional story content and gameplay systems, while the That Time I Got Reincarnated as a Slime collaboration gives players another announcement to anticipate.

Blue Protocol: Star Resonance is available on PC through Steam and on mobile devices.

Further details about the anime collaboration have not yet been announced.