Paradox Interactive has just announced that their new strategic action game, Leviathan: Warships, is now available for pre-order on Steam. If you pre-purchase Leviathan: Warships now you will receive the Marauder Unit Pack for free allowing you to play as the heavily armored enemy from the campaign with three new ships: the Buzzer, the Destroyer and the Overlord.

Developed by Pieces Interactive, Leviathan: Warships is a a top down arcade ship combat game where players can build and customize their own fleet of warships to play with or against their friends in co-op and Challenge Missions across 14 different maps.

Players can pick their fleet from 11 ships, and customize them with 16 different weapon types. The co-operative campaign consists of nine missions, which will be playable asynchronously by up to three players. Additionally there will be five challenge missions outside of the campaign that can also be played co-operatively.

Leviathan: Warships is scheduled to launch on April 30, 2013 for PC, Mac, iOS, and Android platforms.