Ok, here´s a game which, in my opinion, isn´t getting the attention it deserves: http://fromthedepthsgame.com/ It´s a game about creating the vehicles you want (with a building method similar to mincraft, but with a LOT more possibilities) and creat a fleet with custom AI with them and beat your enemy. Has Custom Rockets, turrets and a powerfull physics engine, which allows sea-/ air and in later versions even spacetravel. How you build you ships matters. Simulated weight, buoyancy drag, wind forces for sailing etc. Take a look and decide for yourself and upvote it on greenlight.