It's a game with a singular premise, which apparently attracted quite a few users (by the way, it's 40% off at Steam right now).
And since they've already built the world, taking advantage of it makes a lot of sense. Plus it givees them the chance to lure some players of the first game into trying the other games.
Please excuse my bad English.
Currently gaming on a PC with an i5-4670k@stock (for now), 16Gb RAM 1600 MHz and a GTX 1070
Steam / Live / NNID : jonxiquet Add me if you want, but I'm a single player gamer.