This game is being released on PS4 and PC. It's a 2D platformer and has "fully" customizeable weapons, enhancing the attack with each change.

IGN


The team behind Scott Pilgrim vs. The World: The Game reunited to develop Mercenary Kings, a gun-toting 2D action game that combines precise platforming action and a compelling crafting system. Accomplish various missions to unfold the story and gather materials dropped by defeated enemies to craft your weapon of choice. Any part of your weapon is customizable, each one altering the effect of your attack. Create an arsenal of weapons either to match your own play style or to match the challenge of a specific mission.

Release Date: Q4 2013
Genre: Action
Publisher: Tribute Games
Developer: Tribute Games
Source:http://www.ign.com/games/mercenary-kings/ps4-20000792