Tribute Games have revealed Mercenary Kings. this upcoming PS4 title is a up to 4 player co-op run and gun shooter with a crafting element. defeating enemies and completing objectives rewards the players with loot. this loot can then be used to craft and customise your guns. each gun is split into 5 different parts, and they have over 300 different parts in the game already that you can use to create your own weapon. Mercenary Kings also features local split screen co-op, each screen only shows what that player is doing enabling players to split up and search a level.
Source: EU PlayStation Blog
Press Release