By pressing the triangle button twice, the player can switch between the standard overhead view and first-person mobility.
This mode is just like the main game when played on Normal, except the player can move and shoot while in first-person view mode. Completing the main game once on any difficulty will unlock "1P View Mode" on the Special sub-menu.This change was also carried over to The Twin Snakes. During a third playthrough on the same save file, not only will Snake wear a tuxedo, but Meryl will be outfitted with her own version of the Sneaking Suit.This will also change the camera angles of certain cutscenes (such as when Snake uses his binoculars to scout the Heliport). If the player has data from the original Metal Gear Solid or has already cleared the main game once, then an "alternate round" option will be available when starting a new game which alters the enemy placement and patrol patterns in each area.An alternate method of unlocking the Ninja missions involves the clearing the main game on any difficulty level (except Very Easy) and achieving the highest possible rank (e.g. If this mission is successfully completed, the player can upload the PocketStation's data to the VR Disc and unlock the Ninja missions. This program is actually a minigame in which the player is given a top-secret mission by Naomi Hunter to exchange codenames with five other PocketStation users through infrared linkup within a period of seven days in order to create a vaccine against the FOXDIE virus. If a PocketStation (SCPH-4000) is used to save data instead of a standard memory card, a program can be saved to the device after the player clears the main game and is given their rank.Integral changed back to how it was in the NTSC-J version. This was changed to having him completely nude in the NTSC-U/C and PAL versions, with his buttocks censored in a comical matter through pixelization. When Johnny Sasaki (the jail guard) is undressed by Meryl Silverburgh after escaping, he was originally left with his underwear still on in the NTSC-J version of the original.This change was carried over to Metal Gear Solid: The Twin Snakes. 3 rounds per session on Easy, 4 rounds on Normal, etc.), in Integral, they always last three rounds per sessions regardless of difficulty. Whereas the number of rounds per successions increases in the NTSC-U/C on each difficulty setting (i.e. The torture event against Revolver Ocelot is considerably easier on all difficulty settings.Unlike the other difficulty settings, no ranking is given after the player completes the game. The game is otherwise identical when played on Easy mode. The MP5 is functionally identical to the FAMAS but has unlimited ammunition and a silencer already equipped. In the Very Easy mode, Snake starts the mission off with a weapon, the MP5, already in his arsenal. In addition to the four difficulty settings present in the NTSC-U/C and PAL versions of Metal Gear Solid (Easy, Normal, Hard and Extreme), a Very Easy setting has been added as well.The only mission that was not carried was the "Survival Mission" under the Gun Shooting category in the original version. VR Training mode has been removed from the main menu due to the VR Disc having the original set of 30 stages under the Sneaking category.
Because of changes between the Japanese and English scripts, namely the addition of Western sources (such as de Gaulle and Shakespeare) to Mei Ling's list of proverbs and the different game genres and titles mentioned by Psycho Mantis (due to certain games, such as Policenauts and the Tokimeki Memorial series, never getting English releases), some of the dialogue had to be retranslated back to Japanese for the subtitles.
Other text, such as mission logs and item/weapon descriptions, will still be displayed in Japanese regardless of this setting.