Smart answer:

Your search for Who developed Total War: WARHAMMER III returned the following results:

Creative Assembly

Total War WARHAMMER was developed by Creative Assembly and published by Sega.

Source:

by The Creative Assembly published by Sega

Total War is a turn- based strategy real- time tactics computer game developed by The Creative Assembly published by Sega.

Source:

by The Creative Assembly in Horsham, UK

Total War is a computer strategy game series developed by The Creative Assembly in Horsham, UK.