So I just finished up the game a couple of days ago on pc having played it on 360 when it came out, and was confused as to why I was missing an anti-cube in the end on the pc. I remembered that in the 360 version, and as I checked the steam version, there is an achievement that gives a clue as to how you can get that cube.
As there are no achievements in this version, how is one supposed to understand that without looking it up elsewhere? I hope there is something I just missed otherwise it seems like kind of a silly oversight.
Still love the game of course :D

EDIT: Whoops. Bad reading comprehension.

Wow! So it isn´t explained anywhere on the game? I thought the PC version would have some kind of added clue.

You mean RTRTLTRTRTLTLTLT? It’s in readme file.

That´s nice! :D Didn´t see it!