For a legitimate portable experience, you must own a copy of the game (original PS2 disc or digital purchase) and create the portable package yourself.
This is the most critical section. Searching for red dead revolver pc game download portable puts you in a grey area.
Legality: Emulators themselves (PCSX2) are completely legal. However, downloading the Red Dead Revolver ROM is copyright infringement unless you own the original PS2 disc and rip it yourself. Rockstar still owns the IP. While the game is considered "abandonware" by some (no longer sold new for PC), it is not legally free.
Safety Risks: Because this is a popular keyword, malicious actors target it. Many "portable" downloads contain:
Always scan any portable .exe file with VirusTotal before running it.
Because Red Dead Revolver never had a native PC port, any "portable" version you find online is almost always an emulated copy—specifically, the PlayStation 2 (PS2) or PlayStation 1 version wrapped in an emulator (like PCSX2) with pre-configured settings.
In the context of PC gaming, a portable version of a game is one that does not require a formal installation into the Windows Registry or the "Program Files" directory. Instead, the entire game—executable files, assets, save data, and configuration settings—resides within a single folder.
