| .H2O | Liquid Entertainment | Ficheiros de Jogo | Battle Realms Game Data File | Total Commander | Ghisler Software GmbH |
| .H3M | New World Computing | Ficheiros de Jogo | Heroes 3 Map File | Heroes of Might & Magic III | Ubisoft |
| .H4C | New World Computing | Ficheiros de Jogo | Heroes Of Might And Magic II Map File | Heroes of Might & Magic III | Ubisoft |
| .H4R | New World Computing | Ficheiros de Jogo | Heroes Of Might And Magic IV Data File | Heroes of Might and Magic IV | New World Computing |
| .HAK | BioWare | Ficheiros de Jogo | BioWare Aurora Engine Data File | BioWare Neverwinter Nights | BioWare |
| .HAM | Interplay Entertainment | Ficheiros de Jogo | Descent 2 Resource File | Interplay Descent 2 | Interplay Entertainment |
| .HAT | Landon Podbielski | Ficheiros de Jogo | Duck Game Hat File | Duck Game | Landon Podbielski |
| .HCA | Empirix Inc | Ficheiros de Jogo | Hammer Call Analyzer Network Traffic Data | Hammer Call Analyzer | Empirix Inc |
| .HE | Humongous Entertainment | Ficheiros de Jogo | Humongous Entertainment Game Resource Archive | 7-Zip | Igor Pavlov |
| .HE0 | Humongous Entertainment | Ficheiros de Jogo | Humongous Entertainment Game Archive | ScummVM | Interscape |
| .HEA | EA Sports | Ficheiros de Jogo | FIFA 2001 Data File | FIFA 2001 | EA Sports |
| .HES | Hudson Soft | Ficheiros de Jogo | Hudson Entertainment Sound | Audio Overload | Richard Bannister |
| .HFB | Open Source | Ficheiros de Jogo | Hell Fighter Battle File | Hell Fighter | Open Source |
| .HGH | LucasArts Entertainment Company, LLC | Ficheiros de Jogo | Star Wars: Tie Fighter High Score Data | Star Wars: TIE Fighter | LucasArts Entertainment Company, LLC |
| .HI | Interscape | Ficheiros de Jogo | MacMAME High Scores File | MAME | Open Source |
| .HKX | Bethesda Softworks | Ficheiros de Jogo | The Elder Scrolls V: Skyrim Animation | The Elder Scrolls V: Skyrim | Bethesda Softworks |
| .HLK | Relic Entertainment | Ficheiros de Jogo | Warhammer 40.000: Dawn Of War 2 Animation File | Warhammer 40K Dawn of War | Relic Entertainment |
| .HLS | EA Maxis | Ficheiros de Jogo | SimCity 4 Hitlist | Electronic Arts SimCity 4 | Electronic Arts |
| .HMP | Team17 | Ficheiros de Jogo | Worms Height Map File | Team17 Worms Mayhem | Team17 |
| .HOD | Sierra Entertainment | Ficheiros de Jogo | Homeworld Object Data | Homeworld 2 | Sierra Entertainment |
| .HOF | Unknown Developer | Ficheiros de Jogo | Hall Of Fame Data | Unknown Software | Unknown Developer |
| .HOG | LucasArts Entertainment Company, LLC | Ficheiros de Jogo | Lucas Arts Dark Forces Data File | Star Wars: Dark Forces | LucasArts Entertainment Company, LLC |
| .HOGG | Cryptic Studios | Ficheiros de Jogo | Cryptic Studios Data | Star Trek Online | Cryptic Studios |
| .HOI4 | Paradox | Ficheiros de Jogo | Hearts Of Iron IV Saved Game | Hearts of Iron IV | Paradox Development Studio |
| .HONMOD | S2 Games | Ficheiros de Jogo | Heroes Of Newerth (HON) Modification Manager File | HON Modification Manager | Unknown Developer |
| .HOP | Heavy Iron Studio | Ficheiros de Jogo | The SpongeBob SquarePants Movie Game File | The SpongeBob SquarePants Movie | Heavy Iron Studio |
| .HOTSPOT | Relic Entertainment | Ficheiros de Jogo | Homeworld Cursor Information File | Homeworld | Relic Entertainment |
| .HOUSEHOLDBINARY | Electronic Arts | Ficheiros de Jogo | The Sims 4 Game Data | The Sims 4 | Electronic Arts |
| .HPK | Interscape | Ficheiros de Jogo | HPack Compressed Archive | HPack | Interscape |
| .HPS | Frictional Games | Ficheiros de Jogo | HPL Script | Microsoft Notepad | Microsoft Corporation |
| .HQM | Unknown Developer | Ficheiros de Jogo | Hardcore Questing Mode Data File | Hardcore Questing Mode | Unknown Developer |
| .HS | Open Source | Ficheiros de Jogo | Haskell Script | MacroMates TextMate | MacroMates |
| .HSD | Microsoft Corporation | Ficheiros de Jogo | Hagaki Studio Document File | Microsoft Hagaki Studio | Microsoft Corporation |
| .HUL | Probe Entertainment | Ficheiros de Jogo | Re-Volt Collision Data File | Acclaim Entertainment Re-Volt | Probe Entertainment |
| .HUM | MR Software | Ficheiros de Jogo | OMSI Human Configuration File | OMSI | MR Software |
| .HVA | Westwood Studios | Ficheiros de Jogo | Command & Conquer Voxel Animation Control Data | Command & Conquer: Tiberian Sun | Westwood Studios |
| .HWD | Hedgewars Project | Ficheiros de Jogo | Hedgewars Demo File | Hedgewars | Open Source |
| .HWL | Corel | Ficheiros de Jogo | Corel Writing Tools File | Corel WordPerfect X8 | Corel |
| .HWMAP | Hedgewars Project | Ficheiros de Jogo | Hedgewars Drawn Map File | Hedgewars | Open Source |
| .HWS | Hedgewars Project | Ficheiros de Jogo | Hedgewars Saved Game | Hedgewars | Open Source |
| .HXM | Interplay Entertainment | Ficheiros de Jogo | Descent 2 Resource Modification | Interplay Descent 2 | Interplay Entertainment |
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