The 0verflow Premium Trilogy is a collection of 3 preceding games made in 2006. These were:
- Large PonPon from 1999
- Pure Mail from 2000
- Overflow Pleasure Box from 2001
The trilogy also included some extras, such as a family chart which linked characters from these games to those from the later productions from 0verflow such as the Radish Vacation series or the Days series.