In 1994, Kojima began to plan a 3D sequel to "Metal Gear 2: Solid Snake", titled "Metal Gear Solid" and originally planned for release on the 3DO Interactive Multiplayer. After the 3DO was discontinued, development shifted to the Sony PlayStation. For the transition from 2D to 3D graphics, a new engine had to be developed by Kojima and his team. A gameplay demo was first revealed to the public at the 1996 Tokyo Game Show, and was later shown on day 2 of E3 1997 as a short video. The game was released to critical acclaim. Many outlets noted the game's cinematic qualities and innovative stealth gameplay. Kojima became a celebrity in video game news media, and was surprised when he began to be recognised in public.