Roommate games in order

All 5 games of the Roommate series in the order they came out, from Roommate: Inoue Ryōko (1997) to Ryōko no Oshaberi Room (1999).

1. Roommate: Inoue RyōkoSaturn, PS1, Dreamcast · Datam Polystar (pub.)
   14 Feb
2. Roommate: Ryōko in Summer VacationSaturn · Datam Polystar
   25 Sep
3. Roommate + OnePC · Datam Polystar (pub.)
   27 Mar
4. Roommate 3: Ryōko Kaze no Kagayaku Asa niSaturn · Datam Polystar
   29 Apr
5. Ryōko no Oshaberi RoomSaturn · Datam Polystar
   22 Apr