Each point is one game's rating·dashed lines show each series' overall trend
Games on the chart (4)
| Ecco the Dolphin | Dec 23, 1992 | Main Game | 30 | 74 | 52 |
| Ecco: The Tides of Time | Aug 25, 1994 | Main Game | – | 70 | 70 |
 Ecco Jr. | Dec 31, 1995 | Main Game | – | 69 | 69 |
| Ecco the Dolphin: Defender of the Future | Jun 16, 2000 | Main Game | 74 | 70 | 72 |