Here are some prototype and unreleased sets from the short-lived Atlantis theme
If you could get this set, you'd be getting twelve of those chrome mini-spear pieces
Power miners/Atlantis crossover?
I doubt the practicality of an underwater rocketship...but it still looks cool!
Two deep sea ROV-type vehicles. Note that the first one sports a unique finned projectile on the top
The edgier cousin of the "Portal of Atlantis" set
Prototype of the 7770 Aqua raiders set. They replaced the ussal crab with a lame treasure chest in the final version for some reason