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K.O. Coliseum

What Time Did Teamfight Tactics Set 15 Release?

TFT Set 15, K.O. Coliseum, had region-dependent availability, with mobile following PC by 24 hours. Riot’s July 2025 notes do not name a single worldwide release hour.

By VGSources Team 1 min read
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Teamfight Tactics Set 15, K.O. Coliseum, did not have one worldwide release time in Riot’s announcement. Riot said it would go live by region, with mobile following PC by 24 hours. The set launched in 2025 and is no longer awaiting release.

How Set 15 release timing worked

Riot’s Patch 15.1 notes, published July 29, 2025, introduced K.O. Coliseum. Riot wrote that players could begin ranked play “When K.O. Coliseum goes live in your region, or after you download the latest mobile patch.” That wording makes regional availability—not a single global clock time—the relevant answer.

PC and mobile were separated by 24 hours

The same notes specify a 24-hour delay between mobile and PC going live. In other words, mobile availability followed the PC release rather than arriving simultaneously. The announcement does not give a region-by-region schedule or a specific clock time to convert to local time.

What date did Riot announce, and what does it mean?

The Patch 15.1 notes are dated July 29, 2025. Their page timestamp, 18:00 UTC, is when the notes were published; it is not evidence that the game became playable at that exact time.

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Riot’s Patch 15.2 notes, published August 12, 2025, call themselves the first patch of K.O. Coliseum. That confirms the set was underway by then, but does not establish its precise first-live time worldwide.

Can you still play Set 15?

No: Set 15 was a past release, not an upcoming launch. The cited 2025 notes answer when and how it went live; they do not establish the currently active TFT set or its availability in 2026.

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