Determinance is a close-combat dueling game that will pit you against one, two or three opponents in a free-form sword combat scenario. The arenas consist of large, open areas where you and your opponents fly around, hunting each other down. When you come in contact with each other, you will fly together and swipe your swords around, either blocking your opponents' attacks or trying to hit them yourself.
The most interesting aspect of Determinance is the way you use your sword. For the most part, you will be swiping your mouse back and forth, tracing large arcs in front of your opponent. Your sword leaves a tail behind it that can still harm your enemy. But if you use your sword too often, the tail will go away temporarily while your sword recharges.