Both the PS3 and PC versions of Limbo has extra additional "secret" content over its 360 brethren at release, VG247 can confirm.
When both SKUs were announced earlier this month, Playdead mentioned that they would have a "little extra secret."
In an interview with us last week, studio CEO Dino Patti seemed to hint that there would be additional content for the game for the Triple and Steam versions, saying it would be "something which you will find out" at release.
Patti has since confirmed to VG247 this evening in an email that there is additional content in the game, but it's hidden as a "secret." When asked if it was coming to the 360 version, he said that there was "noting planned."
Limbo is out now on PS3 in the US and Europe. It'll launch on Steam worldwide on August 2.