| Title | Doukyuusei 2: Extra Box |
| was | Doukyuusei 2 |
| Alternative title | 同級生２ ＥＸＴＲＡＢＯＸ |
| Disc title | (removed) |
| was | Extra Box |
| System | Sony PlayStation |
| Media | CD |
| Category | Games |
| Region |  |
| Languages |  |
| Serial | SLPS-00690 |
| Ring | SLPS-00690 1 IFPI L276 IFPI 451E |
| Barcode | 4983164 73821 6 |
| EXE date | 1997-05-18 |
| Edition | Original |
| EDC | No |
| Errors count | 0 |
| Anti-modchip protection | No |
| LibCrypt protection | No |
| Status |  |
| Dumpers | Enker |
| Write offset | +2 |
| Tracks count | 1 |
| Track number | Track 1 |
| Size | 663666192 |
| Sectors | 282171 |
| Length | 62:42:21 |
| CRC-32 | f1e5c064 |
| MD5 | 3d25acd7ef0b04ed3a4cf76211d3494c |
| SHA-1 | 77307153d2f0a794cf4d72293b483575c3edd5e6 |
| Track type | Data/Mode 2 |