4A Games' Oles Shishkovstov, sjef for studioet bak Metro-serien, sier i et intervju at studioets neste spill ikke kommer til å være like lineært som deres tidligere spill, men heller ha en åpen verden vi kan bevege oss i:
"For the game we are working on now, our designers have shifted to a more sand-box-style experience - less linear but still hugely story-driven. I will not go into details, but it requires some work from programmers as well. Also, we are improving graphics in very different aspects"