SRRD is a hybrid of Strategy Railroad Logistics, RTS resources and base build, and Tower Defense. The setting is fictional, but with a historic middle 20th century feel. Coming soon: there will be an episode one release of the game, which will be a set of missions as Campaign I. For Campaign II there will be new features centered around a more interactive build-able world on each level. .
There is a whole set of features around my superweapon railway gun; it now requires you to upgrade a special siding on the map first, and then the gun can only deploy on that platform. This is part of the end game, since you will be able to hit the enemy capital from way across the map. I needed a way to push the superweapon out of reach in the early gameplay. The other trick was to give its projectile a very wide splash damage, so nearly every enemy at their base starts coming for it, once you start targeting structures.