| Abbreviation | Definition |
|---|---|
| OGC | Online Gaming Cheat |
| OGC | Open Gaming Content |
| OGC | Open Gaming Convention |
| OGL | Online Gaming League |
| OGL | Open Gaming License |
| OGM | Open Gaming Meet |
| OGS | Online Gaming Systems |
| OGV | Old Gaming Veterans |
| OGW | Online Gaming World |
| OH | Outside Hitter |
| OHOL | One Hour One Life |
| OLG | Office of Lottery and Gaming |
| OLG | On-Line Gamers |
| OLG | Ontario Lottery and Gaming |
| OLGC | Ontario Lottery and Gaming Corporation |
| OLGR | Office of Liquor and Gaming Regulation |
| OLGR | Office of Liquor, Gaming and Racing |
| omg | oh my god |
| OMSI | OMnibus SImulator |
| ONAF | One Night At Flumpty's |