| Abbreviation | Definition |
|---|---|
| UG | Under Games |
| UGA | United Gaming Alliance |
| UGA | Utah Golf Association |
| UGBA | United Gamefowl Breeders Association |
| UGC | Ukiah Gun Club |
| UGC | Ultimate Gamers Community |
| UGC | United Gamers Coalition |
| UGC | United Gaming Clan |
| UGE | Ultimate Gamers Expo |
| UGG | Under Ground Gamerz |
| UGG | Undying Game Gods |
| UGL | United Gaming League |
| UGO | Unified Gamers On-line |
| UGO | United Gamers Online |
| UGR | Ultimate Gaming Resource |
| UGS | United Gaming Syndicate |
| UGW | UnderGround Wrestling |
| UHA | Ultimate Heavy Athletics |
| UHB | Ultimate HandBook |
| UHE | Uplink: Hacker Elite |