| Extension | File Description |
| .RGBA | Uncommon Files |
| .RGC | Uncommon Files |
| .RGD | Uncommon Files |
| .RGF | Uncommon Files |
| .RGG | Uncommon Files |
| .RGH | Uncommon Files |
| .RGI | Uncommon Files |
| .RGJ | Uncommon Files |
| .RGK | Uncommon Files |
| .RGL | Uncommon Files |
| .RGLR | Uncommon Files |
| .RGM | Uncommon Files |
| .RGQ | Uncommon Files |
| .RGR | Uncommon Files |
| .RGT | Uncommon Files |
| .RGU | Uncommon Files |
| .RGV | Uncommon Files |
| .RGW | Uncommon Files |
| .RGX | Uncommon Files |
| .RGY | Uncommon Files |
| .RGZ | Uncommon Files |
| .RH | Uncommon Files |
| .RH0 | Uncommon Files |
| .RH1 | Uncommon Files |
| .RH2 | Uncommon Files |
| .RH3 | Uncommon Files |
| .RH4 | Uncommon Files |
| .RH5 | Uncommon Files |
| .RH6 | Uncommon Files |
| .RH7 | Uncommon Files |
| .RH8 | Uncommon Files |
| .RH9 | Uncommon Files |
| .RHA | Uncommon Files |
| .RHB | Uncommon Files |
| .RHC | Uncommon Files |
| .RHD | Uncommon Files |
| .RHE | Uncommon Files |
| .RHF | Uncommon Files |
| .RHG | Uncommon Files |
| .RHH | Uncommon Files |
| .RHI | Uncommon Files |
| .RHJ | Uncommon Files |
| .RHK | Uncommon Files |
| .RHL | Uncommon Files |
| .RHM | Uncommon Files |
| .RHN | Uncommon Files |
| .RHO | Uncommon Files |
| .RHQ | Uncommon Files |
| .RHR | Uncommon Files |
| .RHS | Uncommon Files |
| .RHT | Uncommon Files |
| .RHU | Uncommon Files |
| .RHV | Uncommon Files |
| .RHW | Uncommon Files |
| .RHX | Uncommon Files |
| .RHY | Uncommon Files |
| .RHZ | Uncommon Files |
| .RI | Uncommon Files |
| .RI0 | Uncommon Files |
| .RI1 | Uncommon Files |
| .RI2 | Uncommon Files |
| .RI3 | Uncommon Files |
| .RI4 | Uncommon Files |
| .RI5 | Uncommon Files |
| .RI6 | Uncommon Files |
| .RI7 | Uncommon Files |
| .RI8 | Uncommon Files |
| .RI9 | Uncommon Files |
| .RIA | Uncommon Files |
| .RIB | Uncommon Files |
| .RICHMEDIA | Uncommon Files |
| .RICOCHETLW | Uncommon Files |
| .RICONS | Uncommon Files |
| .RID | Uncommon Files |
| .RIDDLES | Uncommon Files |
| Extension | File Description |
| .RIDDLES2F | Uncommon Files |
| .RIDE | Uncommon Files |
| .RIDE2 | Uncommon Files |
| .RIDEOFVALK | Uncommon Files |
| .RIDGE | Uncommon Files |
| .RIE | Uncommon Files |
| .RIFL | Uncommon Files |
| .RIGHT | Uncommon Files |
| .RIH | Uncommon Files |
| .RII | Uncommon Files |
| .RIJ | Uncommon Files |
| .RIK | Uncommon Files |
| .RIL | Uncommon Files |
| .RIM | Uncommon Files |
| .RIN | Uncommon Files |
| .RING | Uncommon Files |
| .RIO | Uncommon Files |
| .RIQ | Uncommon Files |
| .RIR | Uncommon Files |
| .RISCOS | Uncommon Files |
| .RIT | Uncommon Files |
| .RIU | Uncommon Files |
| .RIV | Uncommon Files |
| .RIW | Uncommon Files |
| .RIY | Uncommon Files |
| .RIZ | Uncommon Files |
| .RJ0 | Uncommon Files |
| .RJ1 | Uncommon Files |
| .RJ2 | Uncommon Files |
| .RJ3 | Uncommon Files |
| .RJ4 | Uncommon Files |
| .RJ5 | Uncommon Files |
| .RJ6 | Uncommon Files |
| .RJ7 | Uncommon Files |
| .RJ8 | Uncommon Files |
| .RJ9 | Uncommon Files |
| .RJA | Uncommon Files |
| .RJB | Uncommon Files |
| .RJC | Uncommon Files |
| .RJD | Uncommon Files |
| .RJE | Uncommon Files |
| .RJF | Uncommon Files |
| .RJG | Uncommon Files |
| .RJH | Uncommon Files |
| .RJI | Uncommon Files |
| .RJJ | Uncommon Files |
| .RJK | Uncommon Files |
| .RJL | Uncommon Files |
| .RJM | Uncommon Files |
| .RJN | Uncommon Files |
| .RJO | Uncommon Files |
| .RJP | Uncommon Files |
| .RJQ | Uncommon Files |
| .RJR | Uncommon Files |
| .RJT | Uncommon Files |
| .RJU | Uncommon Files |
| .RJV | Uncommon Files |
| .RJW | Uncommon Files |
| .RJX | Uncommon Files |
| .RJY | Uncommon Files |
| .RJZ | Uncommon Files |
| .RK0 | Uncommon Files |
| .RK1 | Uncommon Files |
| .RK2 | Uncommon Files |
| .RK3 | Uncommon Files |
| .RK4 | Uncommon Files |
| .RK5 | Uncommon Files |
| .RK6 | Uncommon Files |
| .RK7 | Uncommon Files |
| .RK8 | Uncommon Files |
| .RK9 | Uncommon Files |
| .RKA | Uncommon Files |
| .RKB | Uncommon Files |
| .RKC | Uncommon Files |
| .RKD | Uncommon Files |
