Guild Wars 2

So yeah, There are a few keeps and Towers in WvW that are close to water. Mendons Gap, Anzalius Pass, the Lake Tower, Briar Tower, Langor and of course the Bay Keeps, Garrison (to an extent) and Lowlands. Bay and Lowlands also have water accessible gates.

So this is how I see it work. The subs would be identical to the ones the Pact uses in Straights of Devastation. Underwater they fire two harpoons in quick succession. Surfaced they have a cannon that has the range/power of a trebuchet. Essentially a water based trebuchet.

This would allow sieging of the Briar and Lake towers from the water environment in the middle of the Borderlands, as well as being able to attack the Garrison Water Gate from the water, and attacking both Inner and Outer bay aquatically. Clever placement can also allow them to be used in Eternal to attack Langor, Anzalius, Mendons, Overlook, Valley and Lowlands.

I have long wished that they would have a wvw map with a tower/keep/castle that was only seigeable via underwater siege (I thought of underwater rams, like subs, and underwater harpoon guns, like the current ballistas)

But we need Anet to refine its water combat system first. I think the first step in that is to create a secondary set of traits when you enter the water, similar to how your utility skills change when you enter the water. The water combat looks and feels great, it just has issues with balancing. I hope Anet doesn’t continue to ignore its water combat system in the future, it has a LOT of potential to be really fun and add a lot of depth and variety to the game.