AFGNCAAP said:
One-Terrain Worlds: I like campaign settings to have a variety of terrain (& thus allow for a variety of adventures)--thus, I didn't enjoy the desert-dominated Dark Sun, nor could I really get into an all-aquatic campaign (sorry, Aeolius).
Not a problem. In the interest of improving my undersea campaign, I am always open to constructive criticism.
To me, an aquatic campaign is no more a "one terrain world" than one based in air. Under the surface of the sea, there are a variety of terrains. While the stereotypical shipwrecks and coral reefs are to be expected, envision a floating "swamp" of sargassum seaweed cloaking the waters below while providing shelter to those within. Imagine a massive forest of mangrove trees, their roots dropping into the depths in a tangle of slime-encrusted spikes. Perhaps a gentle plain of sea grass is more to your liking, or in contrast the despoiled flats of an urchin barren or desert of dead coral.
Have you ever seen a forest of kelp, rising from the depths to entangle the unwary? Can you visualize a bramble of brittle stars, a living terrain of writhing spider-like sea stars? Or perhaps it is the darkness of the depths that lure you, home to mountainous hydrothermal vents and salt-rich undersea lakes known as cold seeps.
Yes, you might consider an undersea campaign to be limited. After all, the standard races in the PH are all but useless without magical assistance. I know how difficult the concept of abandoning a human-centric campaign can be. Instead of humans, dwarves, and halflings, one has to investigate alternatives such as locathah, merfolk, and tritons.
And then there is the matter of treasure. Gold pieces are to be encountered sparingly, near the ruins of a sunken settlement or within a lost treasure fleet. Instead, wealth may be measured with varicolored pearls, living stalks of golden coral, or the rarest of seashells. If you wish for more mundane items, consider that diamonds are often mined underwater.
Or is it the complexity of movement, which dissuades DMs from attempting an adventure beneath the waves. In essence, all of the NPCs and PCs can fly, as a world of water is one of three dimensions. Battlemats don't take into account an adversary that can be ten fathoms above or below you, in addition to five squares northwest.