Because the game is not available on modern digital storefronts like Steam or Epic Games, you can find the original PC files on the following archival sites:
Finding a free, full-version download for the original 1998 PC release of The House of the Dead is primarily possible through community-driven archives, as the game is widely considered "abandonware." This means it is no longer sold or supported by the original publisher, Sega. Where to Find The House of the Dead the-house-of-the-dead-1-pc-game-free-download-full-version
If you'd like, I can help you find or patches to help the original version run on your current version of Windows. The House Of The Dead : Sega - Internet Archive Because the game is not available on modern