Clair Obscur Update 1.5: Endless Tower Bosses Ruthless

• Patch 1.5.0 for Clair Obscur: Expedition 33 shadow-dropped with tougher late-game content. • Sandfall Interactive added new Endless Tower boss variants including a Divergent Star rework of Simon. • Patch also introduces Verso's Drafts, localisation updates, costumes and a punishing red-ring diving-board challenge. • Players on Reddit report being stunned, struggling, and praising the difficulty spike.

What Patch 1.5.0 changed

Sandfall Interactive’s quietly released Patch 1.5.0 expanded Clair Obscur: Expedition 33 with multiple late-game systems aimed at veterans.

The update added "new boss battles for late-game players to overcome in the Endless Tower," described by the studio as tougher variations of the game’s iconic foes. The patch also brings a new playable area called Verso's Drafts, localisation work and cosmetic costumes.

Divergent Simon: a rematch turned ruthless

Perhaps the most talked-about change is the Divergent Star version of Simon, a reimagining that players say outstrips even his already brutal base-game form.

Reddit threads and community posts show many players stuck at Simon’s new mechanics and damage windows, with some describing it as among the hardest single-boss challenges they’ve faced in modern RPGs.

New platforming and the red-ring challenge

Alongside remixed bosses, Patch 1.5.0 adds a high-precision red-ring diving-board challenge in the Endless Tower. The sequence demands tight timing and exact positioning, raising the bar for speedrunners and completionists alike.

Community reaction

Players reacted quickly on social media and Reddit. Many posts mix awe with frustration as veteran players who cleared expert runs describe being humbled by the Endless Tower variations.

One player wrote: "I honestly played many games considered 'hard', but this is driving me insane.... I beated Simon in expert within 10 tries, then Osquio also in expert on my second attempt. But these 4 bosses in the Endless Tower are something else... I don't think i've ever encountered anything that hard ever, Simon specially."

Tips for players attempting the new content

Prepare builds and consumables

Reassess defensive stats and crowd-control tools; these encounters punish mistakes.

Study patterns

Watch community clips and practice the red-ring sections in low-stakes runs before committing resources.

Why this matters

By pushing the difficulty envelope, Sandfall is courting a niche of hardcore players who value challenge and replayability. The changes will likely extend Expedition 33’s lifespan and provoke fresh meta shifts for late-game builds.