| Abbreviation | Definition |
|---|---|
| RAWR | Right Answer, Wrong Reason |
| RB6 | Rainbow Siege Six |
| RB6S | Rainbow Six: Siege |
| RBH | The Reptilian Brotherhood |
| RBLX | RoBLoX |
| RBO | Reverse Boss Order |
| RBS | Rusty's Battle System |
| RBX | RoBloX |
| RBXP | Robloxs Best Extreme Player |
| RBY | Pokemon Red Blue and Yellow |
| RC | Ratchet and Clank video game |
| RC | Roletosoft Commander |
| RC | Royal Challenge |
| RC | Rubik's Cube |
| RCB | Royal Challengers Bangalore |
| RCPD | Raccoon City Police Department |
| RCPD | River City Police Department |
| RCT3 | Roller Coaster Tycoon 3 |
| RD4 | Research & Development No.4 Department |
| RDA | Random Arrest |