Each point is one game's rating·dashed lines show each series' overall trend
Games on the chart (3)
| Police Quest: In Pursuit of the Death Angel | Dec 1, 1987 | Main Game | – | 60 | 60 |
| Police Quest II: The Vengeance | Nov 1, 1988 | Main Game | – | 70 | 70 |
| Police Quest III: The Kindred | Oct 1, 1991 | Main Game | – | 76 | 76 |