| Abbreviation | Definition |
|---|---|
| HESS | Hyper Extended Super Slide |
| HEV | Hazardous EnVironment |
| HFIL | Home For Infinite Losers |
| HGA | Hardcore Gamers Alliance |
| HGL | Hardcore Gamer League |
| HGLL | Higher Ground Legendary Level (gaming) |
| HH | Hidden Hatchet |
| HIS | Heavy Iron Studios |
| HKO | Hello Kitty Online |
| HL1 | Half Life 1 |
| HLAE | Half Life Advanced Effects |
| HLCCL | Half Life Clan Collision League |
| HLDM | Half-Life Deathmatch |
| HLDS | Half-Life Dedicated Server |
| HM | Hotline Miami |
| HMC | Hazy Maze Cave in Super Mario 64 |
| HMDS | HMDS- Harvest Moon DS |
| HMGS | Historical Miniatures Gaming Society |
| HMOMC | Heroes of Might and Magic: Complete |
| HMP | Hurt Me Plenty (Doom) |