Each major region Indiana Jones and the Great Circle has its own boxing ring, and each boxing ring has its own unique unlocking conditions. The same applies to Sukhothai, the last major region Indy can explore as he heads towards the finale, and home to the game's toughest set of close fights. As always, there's a big cash prize involved, which you can use to buy things like maps and skill books as you progress. The Great Circle.
And also as always, you will need to find a specific disguise to gain access to the Sukhothai boxing ring. They are very specific about who participates in the fights, so you will need to convince them that you are part of the group in order to join. See how to enter the Sukhothai boxing ring at Indiana Jones and the Great Circle.
Where to find the underground boxing ring in Sukhothai
Unlocking the boat
The Sukhothai boxing ring is located north of the village of Khaimuk Satsitbut you will need a boat to reach it. Fortunately, you'll unlock the boat fairly early on during your travels through Sukhothai, simply by progressing through the main story. Once you've done this and effectively unlocked free movement around the map, you can head out from Khaimuk Satsit to find the underground boxing ring, or Bruiser Pit as this particular one is called.
Finding the Bruiser Pit
After unlocking the boat, find the boat dock on the west side of Khaimuk Satsit village and climb aboard. Head north past the villagestaying on the east coast (on your right). You're looking for a dock on that side, but it's partially hidden by trees, so stick around. Stop at the first dock you see and get off the boat. From there, just walk a short distance to the first and only building you see in the immediate vicinity and you will find the Sukhothai boxing ring.
However, If you're not wearing the right disguise, you won't get innot very different the Vatican and Giza boxing rings, which require black shirt uniform and Wehrmacht uniform respectively. Finding the ring will unlock the associated side quest, which will show a marker on your map pointing to the approximate location of the disguise you need. Below is a guide on how to find the Royal Army uniform that will take you to the Sukhothai Bruiser Pit.
Where to find a Royal Army uniform
Arriving at Voss camp
To enter the Sukhothai boxing ring in the Royal Army uniform, you will need to go further north to Voss camp. The problem is that there's no way to get there by boat, so instead you'll need to dock at Wat Chana Songkhram first. On the north side of the island, you will find a hole in the wall that you can sneak through to reach a wooden bridge that will take you to the Voss fortress.
The entire Voss camp is very well patrolled, so try to stay out of sight as you head to the west side of the area (pictured on the map above). Near the barracks and the large building with the radio tower you will find a row of showers. On a table near that row of showers, next to a staircase leading to a lower area, the Royal Army uniform lies on a table. Take it, escape the island the same way you arrived, and you can return to the boxing ring you found earlier.
As always, you will participate in three rounds of boxing once you enter. These are some of the hardest fights in the gameso make sure you've leveled up as many fight-relevant skill books as possible. Make sure you deflect your opponent's attacks and don't be greedy with your responses – a few quick strikes and then go back to blocking.
After that, you can redeem your prize in cash (500 baht) plus 720 Adventure Points. If you have already finished all the fights in the Vatican and Gizeh, you will also receive the Tour de Force achievement, to signify the completion of all boxing fights in Indiana Jones and the Great Circle.