PaRappa the Rapper games in order

All 4 games of the PaRappa the Rapper series in the order they came out, from PaRappa the Rapper (1996) to PaRappa the Rapper 2 (2001).

1. 
   PaRappa the RapperPS1, PS4, PSP · NanaOn-Sha
   606 Dec
2. 
   Um Jammer LammyPS1, Arcade, PS3 +1 · NanaOn-Sha
   7118 Mar
3. 
   Um Jammer Lammy NOW!Arcade · Sony Interactive Entertainment, NanaOn-Sha
   15 Dec
4. 
   PaRappa the Rapper 2PS2, PS4 · NanaOn-Sha
   7630 Aug