Duel

The fourth game mode you will unlock is called Duel. This mode will unlock when you have collected 600 Trophies. This is a PVP mode where you select a team of three Hunters to vs another player's three Hunters. You will start the game with your Primary Hunter. If this Hunter is defeated you will have the option to choose your next Hunter from your two Secondary Hunters.

The goal of this mode is to defeat your opponent's team of three Hunters. This mode isn't played very often. It takes longer to find a match and I do find some issues with latency which can cause some weird outcomes during matches or disconnects. Sometimes you will just die instantly from full health even though Death Strike does not work in this mode. Also, it can be pretty dependent on luck of Hunter choices. If your opponent chooses a Hunter that counters your choices there isn't much you can do. Once around 15-20 seconds have elapsed both players will begin to take damage over time. This will increase as more time passes until one Hunter dies.

Strategy

I would avoid this mode but if you are playing it you will have to go in and out of the tall grass to remove the sight lines from your opponent. There are also some hearts on the map you can grab if you get damaged. The best strategy I found is to position yourself in the grass so you can get the drop on your opponent as they come in.