series' plot. While not intending to send a religious message, members from the Capcom team did research in Vatican City and Istanbul. On September 6, 2006, Japanese video game magazine Famitsu reported that the previous games' main character, Dante, would not be the protagonist in Devil May Cry 4. Instead, a new character named Nero, voiced and motion captured by Johnny Yong Bosch, took the lead. The use of a new protagonist was discussed many times at Capcom but was not approved until producer Hiroyuki Kobayashi said that the Dante character had to be in the game. Fearing negative feedback, as happened when Konami's stealth game Metal Gear Solid 2: Sons of Liberty introduced a new character, replacing protagonist Solid Snake with newcomer Raiden, producer Kobayashi said Capcom aimed to make Nero fun to play like Dante and intended to make him stronger at some point. Two of the game's PC exclusive features are Turbo Mode (previously used only in Devil May Cry 3: Special Edition) giving the game a twenty percent speed boost, and a new difficulty mode called Legendary Dark Knight Mode which can display over 100 enemies in some missions at once. Both features returned in the Devil May Cry 4: Special Edition release. The PC version also has both DirectX 9 and DirectX 10 mode. It is labeled Games for Windows and runs on XP, Windows Vista and Windows 7. It assumes a Gamepad is present and only uses the mouse in the menus, providing the same interface as the Xbox 360 version. Engine Hiroyuki Kobayashi noted the production team began working with the game using a PC-based engine. He said that this was the first PlayStation 3 game developed by Capcom, and making this transition was a "hard step", particularly because no member of the production team was familiar with the console's capabilities. Capcom justified the game's multi-platform crossover by emphasizing the Xbox 360's success in the North American and European markets, labeling the move as "natural". The final version of Devil May Cry 4 uses Capcom's internally developed MT Framework engine. In a thread questioning the move on the official Capcom message board, the company's senior director of strategic planning and research, Christian Svensson, responded by saying that they were moved by people's strong feelings about the decision, but that it was the best decision for the company and consumers. He also claimed that