Go upwards to another dimension! Well, it's more like 0.5 dimensions, but that still counts right?
Hint 1: >!This is a sequel!<
Hint 2: >!This is a RPG much in the same vein as its predecessor!<
Hint 3: >!Very old game (10+ year old)!<
Hint 4: >!Funnily enough, the game does reference another full dimension, but it's not the one you expect...!<
Hint 5: >!Think less dimensions in terms of another realm and more in the "scientific" definition of it!<
Hint 6: >!Probably not the type of RPG you’re thinking of when you hear RPG!<
Hint 7: >!The name of the game can also be used as a general, if very vague, overview/description of it!<
Hint 8: >!One of the things the previous game to this is known for is the ability to kill a child through lung cancer!<