| | Death Crimson OX (JPN, USA, EXP, KOR, AUS) | 2000 | Ecole Software | deathcox | | 0.00 |
 | Decathlete (JUET 960424 V1.000) (clone of: decathlt) | 1996 | Sega | decathlto | | 0.00 |
| Decathlete (JUET 960709 V1.001) | 1996 | Sega | decathlt | Sports / Track & Field | 7.50 |
| | DECO Cassette System | 1981 | Data East Corporation | decocass | BIOS | 8.20 |
| | Deep Impact (Mazooma) (Scorpion 4) (set 1) | 1969 | Mazooma | sc4deepi | | 0.00 |
| | Deep Impact (Mazooma) (Scorpion 4) (set 2) (clone of: sc4deepi) | 1969 | Mazooma | sc4deepia | | 0.00 |
| | Deep Impact (Mazooma) (Scorpion 4) (set 3) (clone of: sc4deepi) | 1969 | Mazooma | sc4deepib | | 0.00 |
| | Deep Impact (Mazooma) (Scorpion 4) (set 4) (clone of: sc4deepi) | 1969 | Mazooma | sc4deepid | | 0.00 |
| | Deer Hunting USA V1 (clone of: deerhunt) | 2000 | Sammy USA Corporation | deerhunte | | 0.00 |
| | Deer Hunting USA V2 (clone of: deerhunt) | 2000 | Sammy USA Corporation | deerhuntd | | 0.00 |
| | Deer Hunting USA V3 (clone of: deerhunt) | 2000 | Sammy USA Corporation | deerhuntc | | 0.00 |
| | Deer Hunting USA V4.0 (clone of: deerhunt) | 2000 | Sammy USA Corporation | deerhuntb | | 0.00 |
| | Deer Hunting USA V4.2 (clone of: deerhunt) | 2000 | Sammy USA Corporation | deerhunta | | 0.00 |
| | Deer Hunting USA V4.3 | 2000 | Sammy USA Corporation | deerhunt | | 0.00 |
 | Defence Command (Defender bootleg) (clone of: defender) | 1981 | bootleg (Outer Limits) | defence | Shooter / Flying | 0.00 |
 | Defend the Terra Attack on the Red UFO | 1981 | Artic | redufo | Shooter / Gallery | 4.00 |
| Defend the Terra Attack on the Red UFO (bootleg) (clone of: redufo) | 1981 | bootleg | redufob | | 0.00 |
| Defender (Blue label) (clone of: defender) | 1980 | Williams | defenderb | | 0.00 |
| Defender (bootleg) (clone of: defender) | 1980 | bootleg (Jeutel) | defndjeu | Shooter / Flying | 0.00 |
| Defender (Green label) (clone of: defender) | 1980 | Williams | defenderg | | 0.00 |
