It's Pirates Vs Vikings, a fun minigame where you must eliminate the enemy ship using your boat piloting skills and your team communication. Have fun sailing!
Please add at least 3 images of your map to allow viewers to see more of your creation. Also, is the gametype really extermination? I feel that the minigame may be more suited to breakout or regular slayer mode.
I only have one screen shot because I only took one, but I'll be Sure to take more and I'm not entirely sure what extermination is but now that I think about it I would say its either a mini game or breakout.