It's kind of complicated but Interplay was the publisher for both Black Isle and Bioware. Black Isle was their in house company that developed and helped many of their other developers, thus you'll see Black Isles credits on Biowares games as they helped with QA and such. Black Isle were given the rights to use Biowares infinity engine by Interplay the parent company, and used it in Icewind Dale and Torment.
Bioware split with Interplay during the production of Neverwinter Nights and left the company to make independent games, initially published under the Atari label and then a number of others.
Many early Interplay veterans left to form Troika after Fallout/during the making of Fallout 2, others left Black Isle later to form Obsidian Entertainment under Feargus Urqhart. Brian Fargo the original founder of Interplay formed InExile who are currently making Wasteland 2, while Interplay still clings on to life selling what old games they still own the rights to under a bloke called Herve Caen.
Long story short if you want a game like Planescape/Icewind Dale/Fallout 1&2 go with Obsidian or InExile. That's how i've heard it anyway, i'm glad I just dig, shift and lay track for a living, this is all very complicated.
Bioware split with Interplay during the production of Neverwinter Nights and left the company to make independent games, initially published under the Atari label and then a number of others.
Many early Interplay veterans left to form Troika after Fallout/during the making of Fallout 2, others left Black Isle later to form Obsidian Entertainment under Feargus Urqhart. Brian Fargo the original founder of Interplay formed InExile who are currently making Wasteland 2, while Interplay still clings on to life selling what old games they still own the rights to under a bloke called Herve Caen.
Long story short if you want a game like Planescape/Icewind Dale/Fallout 1&2 go with Obsidian or InExile. That's how i've heard it anyway, i'm glad I just dig, shift and lay track for a living, this is all very complicated.