High Quality Content by WIKIPEDIA articles! Planescape: Torment is a computer role-playing game developed for Windows by Black Isle Studios and released on December 12, 1999 by Interplay Entertainment. It takes place in Planescape, an Advanced Dungeons Dragons (AD D) fantasy campaign setting. The game`s engine is a modified version of the Infinity Engine, which was also used for BioWare`s Baldur`s Gate, a previous AD D game set in the Forgotten Realms.