| ISAO Promotion Disc by Seaman | JP | |
| Commercial |
| Idol Janshi o Tsukutchaou | JP | 1999-09-23 |
Jaleco | Commercial |
| Ikaruga | JP | 2002-09-05 |
ESP Software | Commercial |
| Illbleed | JP | 2001-03-29 |
Crazy Games | Commercial |
| Illbleed | TW | 2001-04-16 |
AIA | Commercial |
| Illbleed | US | 2001-04-16 |
AIA | Commercial |
| Imakoso!! Dreamcast with Special GD!! | JP | |
| Commercial |
| Imperial no Taka - Fighter of Zero | JP | 2000-06-29 |
Global A Entertainment | Commercial |
| Incoming | EU | 1999-10-14 |
Rage Software | Commercial |
| Incoming | US | 1999-11-30 |
Interplay | Commercial |
| Incoming - Jinrui Saishuu Kessen | JP | 1998-12-17 |
Imagineer | Commercial |
| Industrial Spy - Operation Espionage | US | 2000-06-01 |
UFO | Commercial |
| Inhabitants | US | 2005-01 |
GOAT Store | Unlicensed |
| Inoue Ryouko - Last Scene | JP | 2001-11-08 |
Datam Polystar | Commercial |
| Inoue Ryouko - Roommate | JP | 2001-07 |
| Commercial |
| Interlude | JP | 2003-03-13 |
NEC Interchannel | Commercial |
| Internet Browser for Dreamcast | US | |
| Commercial |
| Intrepid Izzy | JP | 2021-08 |
Senile Team (first run) | Unlicensed |
| Intrepid Izzy | US | 2021-08 |
Senile Team (first run) | Unlicensed |
| Irides - Master of Blocks | US | 2009-12 |
GOAT Store | Unlicensed |
| Iris | JP | 2003-08-07 |
KID | Commercial |
| Iron Aces | EU | 2001-06-29 |
Xicat Interactive | Commercial |
| Iron Aces | US | 2001-02-06 |
Infogrames | Commercial |
| Izumo | JP | 2004-01-29 |
Symbio Planning | Commercial |