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$20 Million Reasons to Clear Your Calendar: ACR OSS Returns May 11
- 171 events, $20M+ guaranteed prize pool
- Buy-ins from $5.50 to $2,650; main event up to $1.5M GTD
- No events Fridays/Saturdays; mystery bounties, leaderboard prizes
The ACR Online Super Series returns May 11 with $20M GTD across 171 events.
(credit: ACR Poker)
The ACR Online Super Series is back and it is bringing 171 events, total $20M+ GTD , and two full weeks for you to run deeper than ever before between May 11–21!
ACR OSS May 2026 edition covers every bankroll from $5.50 to $2,650 with massive guarantees and mystery bounties.
Want to know more? Check the details and highlights below.
ACR OSS May 2026 Infobits
| Detail | Info |
|---|---|
| Dates | |
| Total Events | 171 |
| Total Guaranteed | $20,000,000+ |
| Buy-In Range | $5.50 to $2,650 |
| OSS Leaderboard | $30,500 |
| Main Event Buy-Ins | |
| Biggest GTD | |
| Mystery Bounty Entry | From $5.50 |
Mystery Bounty multi-flight Day 1s are already running from April 26. No flights run on Fridays or Saturdays, so plan your schedule around Sundays through Thursdays for the full two weeks.
OSS May Main Event: Four +$1M GTD Events
All three flagship Main Events share the same two-Day structure with Day 1A on May 17, Day 1B on May 24, and Day 2 on May 25. The Multi-Flight Main Event plays from May 11 to 25 (Day 2 Final).
| Event | Buy-In | GTD | Day 1A | Day 2 |
|---|---|---|---|---|
| OSS High Main Event | $2,650 | $1,500,000 | May 17 | May 25 |
| OSS Medium Main Event | $1,050 | $1,500,000 | May 17 | May 25 |
| OSS Low Main Event | $215 | $1,000,000 | May 17 | May 25 |
| OSS Multi-Flight Main Event | $630 | $1,000,000 | May 11 | May 25 |
ACR OSS Mystery Bounties
Mystery Bounties are one of the trademarks of ACR Poker. Naturally this also shows in the OSS, even though their biggest Mystery Bounty events, the Dual Mystery Bounty Venoms, just wrapped up in April 2026.
| Event | Buy-In | GTD | Flights | Day 2 |
|---|---|---|---|---|
| Mystery Bounty | $109 | $750,000 | April 26 to May 25 | May 25 |
| Mystery Bounty | $33 | $150,000 | April 26 to May 24 | May 24 |
| Mystery Bounty | $6 | $75,000 | April 26 to May 24 | May 24 |
What Happened Last Time: OSS XL March 2026 Results
The March 2026 OSS XL beat its $50M guarantee by $10M and drew 569,903 entries from 128 countries. Both flagship Main Events crushed their guarantees and the top prizes were the real deal.
| Event | Entries | Winner | Top Prize |
|---|---|---|---|
| $2,650 OSS XL Main Event | 994 | Rushgold | $480,796 |
| $1,050 OSS XL Main Event | 2,298 | DificilHein | $304,208 |
| $215 OSS XL Main Event | 5,159 | manuelmpc | $151,557 |
| $109 Sunday Moneymaker | 4,225 | PERRYNELL | $64,418 |
$30,500 Up for Grabs For Active OSS Grinders
The OSS leaderboard runs the full two weeks and rewards results but also volume. Points stack from every OSS tournament entered across all buy-in tiers, meaning the grinder firing $5.50 Mystery Bounty flights every day is just as much in the race as the high roller taking shots at the $2,650 Main.
The previous OSS XL leaderboard paid its overall winner $15,000 on top of regular prize money, with separate High, Medium, and Low tier prizes awarded throughout.
Get In the OSS and Run Deep the Rest of the Month
The OSS is built for players with lives. No Friday events, no Saturday events, 171 tournaments across twelve days with buy-ins starting at $5.50. Guaranteed prize pools on this series have a track record of being beaten, and now with 3 main events and mystery bounties, I will be surprised if no records get renewed.
ACR also just closed out April with the Dual Mystery Bounty Venoms, two back-to-back massive guaranteed events that produced some of the biggest paydays on the platform this spring. The Mystery Bounty multi-flights in the OSS follow the same structure and prize mechanic, starting at $5.50 and running up to $109 with Day 2 on May 24 and 25.
If you play online poker in May and skip the OSS, you need a better excuse than a busy calendar. Check the full OSS schedule here.
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