Mothergunship is a First person shooter with unique modular weapon crafting. Choose your own arrangement of connectors, barrels and caps for two weapons, one in each hand, then blast away in missions. You need to be constantly moving to dodge incoming fire and shooting back. Lots of gunfire on the screen when fighting and can be disorienting.
Train Simulator world 2 is another entry of the Transport simulators, which so far I have avoided. Each train works slightly differently which I imagine it true to their real life trains. Main objectives are to keep under speed limits, follow traffic control signals and stop accurately at stations. Learning the keyboard shortcuts for Throttle and Brakes will greatly help you on your career.