In We Need to go Deeper you will play in three environments: In your submarine, in the biome your submarine dives through, and in underwater caves.
Interior of your Submarine
See: Submarines
Here, you will repair dents, carry torpedoes and access the consoles your sub provides. But beware! Monsters such as the Barnacle Spider, Duopus, and Blob Fish can break in and cause havoc among your crew!
Exterior of your Submarine
See: Biomes
The main view for helmsman and gunner. It's what's around your ship: Rocks, monsters, tons of water.
Caves
See: Cave
From time to time, you will encounter underwater caves. Here, you can exit your submarine and go exploring by foot. Although filled with monsters, caves reward you with gold, new items, and important upgrades for your submarine.
Underwater Civilizations
See: Civilization
Underwater Civilizations are similar to caves. They have shops where you can spend the gold you have found on the current adventure. You can also attack the residents and break the containers to steal the items for sale, but the residents do about 4 damage per hit.