I took these screencaps from the video game らんま1/2 打倒、元祖無差別格闘流! ‘Ranma 1/2: Datou, Gansou Musabetsu Kakutou-ryuu’ for the NEC PC Engine system. This artwork features the main Ranma 1/2 girls illustrated as ‘bionic’ robots. These images were accessible from the password screen as a secret area called 「福嶋の窓」’Fukushima no Mado.’ The only artist name I can gather is Fukushima from the title screen and the signatures in the images as Fuku. The game manual does not list the staff and I’m in no mood to play through the game to check the credits.
The last images are also hidden images accessible by passwords. They are the menus for Shampoo’s ‘Nekohanten’ and Ukyou’s ‘Okonomiyaki Ucchan.’