Complex sentence: In terms of copyrights and ownership, Monolith sold the rights for "Blood" to GT Interactive who published the games; the company was later purchased by Infogrames which has since been renamed to Atari.
Split into simpler sentences: In terms of copyrights and ownership, Monolith sold the rights for "Blood" to GT Interactive. GTI was later acquired by Infogrames which has since been renamed to Atari.