| Console: | Sony Playstation 3 |
| TV Standard: | Other |
| Developer(s): | Kojima Productions (Konami) |
| Publisher(s): | Konami |
| Release Date: | 2008-06-26 |
| Players: | 1 |
| Co-op: | No |
| ESRB: | Not Rated |
| Type: | Productivity, Virtual Console |
The Metal Gear Solid 4 Database is a downloadable application for the PlayStation 3. It takes the form of an encyclopedia, and catalogs every piece of Metal Gear in-game lore from all canonical entries in the series at the time of its release: Metal Gear, Metal Gear 2: Solid Snake, Metal Gear Solid, Metal Gear Solid 2: Sons of Liberty, Metal Gear Solid 3: Snake Eater, Metal Gear Solid: Portable Ops, and Metal Gear Solid 4: Guns of the Patriots.
The Database was released on June 19, 2008 in the PlayStation Store in North America and Japan. It was released in the European store one week later.
A user can choose to navigate the Database either alphabetically or by category. In the case of category, the entries in the encyclopedia can be accessed from an alphabetical list, a timeline of the series' in-game universe or a relationship tree (exclusively showing characters and affiliated groups). Articles will contain highlighted words which link to related articles, and the application itself keeps track of all articles viewed. By default, the Database locks all references to Metal Gear Solid 4 to safeguard against spoilers. In order to unlock this hidden information, the player must have a completed Metal Gear Solid 4 save file (and player data file, to ensure the save file was not downloaded). Even when fully unlocked it still contains minor gaps, and even the Database never fully explains everything.
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