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. .
The expansion Outpost is a structure that is built just like the defensive turrets. These are used to enlarge the placement zone outwards from a main base or encampment station structure, so that turrets can cover more approaches.