The Twin Snakes features graphical improvements over the original, new cut scenes written and directed by Ryuhei Kitamura, and gameplay functions originally introduced in the sequel Metal Gear Solid 2: Sons of Liberty. The game also includes a revised translation with re-recorded voice acting using most of the original English voice cast.
For The Twin Snakes, Metal Gear Solid's gameplay was altered to resemble that of Metal Gear Solid 2: Sons of Liberty. While all of the original areas and enemies were kept, new ways for the player to combat them were introduced, such as the ability to shoot using first person view. Enemy AI was also improved, giving enemy soldiers the ability to communicate with each other and detect the player more intelligently. However, some features from the original PlayStation game were kept for aesthetic reasons (for instance all of the Codec conversations feature the original graphics).
Although The Twin Snakes was largely developed at Silicon Knights, its cut scenes were developed in-house at Konami and directed by Japanese film director Ryuhei Kitamura, reflecting his dynamic signature style, utilizing bullet-time photography and choreographed gunplay extensively. Kitamura created many of the games cinematics to look identical to those in the original Metal Gear Solid, but upon inspection Hideo Kojima had him redo them. The game's composition duties were split: some of the in-game music was handled by Steve Henifin and Silicon Knights' music staff, while the rest of the music (in-game, menus and cut scenes) was handled by Konami's music staff, including Metal Gear Solid 2 co-composer Norihiko Hibino.
In Japan The Twin Snakes was released on March 11 alongside an exclusive Premium Package. The box includes the game itself; a platinum-colored GameCube adorned with the FOXHOUND logo; a 44-page book titled Memorandum containing production notes, sketches and photos; and a GameCube disc called the "Special Disc" containing an emulated version of the Famicom version of the original Metal Gear and a trailer of The Twin Snakes.
|Voice Actor||Former Pseudonym||Character|
|David Hayter||Sean Barker*||Solid Snake|
|Cam Clarke||James Flinders||Liquid Snake|
|Debi Mae West||Mae Zadler||Meryl Silverburgh|
|Paul Eiding||Paul Otis||Roy Campbell|
|Jennifer Hale||Carren Learning||Naomi Hunter|
|Kim Mai Guest||Kim Nguyen||Mei Ling|
|Renee Raudman||Renne Collette||Nastasha Romanenko|
|Christopher Randolph||Christopher Fritz||Hal "Otacon" Emmerich|
|Rob Paulsen||N/A||Gray Fox/Cyborg Ninja|
|Patric Zimmerman||Patric Laine||Revolver Ocelot|
|Peter Lurie||Chuck Farley||Vulcan Raven|
|Doug Stone||none||Psycho Mantis|
|Tasia Valenza||Julie Monroe||Sniper Wolf|
|Greg Eagles||George Byrd||Donald Anderson|
|Allan Lurie||Bert Stewart||Kenneth Baker|
|William Bassett||Frederick Bloggs||Jim Houseman|
|Dean Scofield||Dino Schofield||Johnny Sasaki|
Despite receiving generally favorable reviews, The Twin Snakes has also drawn criticism. According to GamePro, the game has a "flagging framerate and bouts of slowdown that occur when too much activity crowds the screen." The new gameplay elements from MGS2 have also been criticized as unnecessary, as the level design is virtually unchanged from MGS1, and even "spoil the challenge ... and completely ruin at least one boss battle. Mario and Yoshi made a appearance in a level as models.