Oddworld Inhabitants is known for being generous. They have historically given away Abe's Oddysee and Abe's Exoddus for free during "Save the Mudokon" anniversaries on Steam and GOG. Keeping an eye on their social media is the best way to snag a legal free copy.
While is a classic of the PlayStation era, finding a "free download" usually leads to one of two places: legitimate "abandonware" sites or risky, unofficial sources. If you are looking to revisit SoulStorm Brewery safely, The Best Way to Play: Modern Platforms Oddworld: Abe’s Exoddus Free Download
Websites like MyAbandonware host the game files. While these sites are popular for retro gaming, keep in mind that "abandonware" is a legal grey area—the copyright hasn't expired, but the owners aren't actively pursuing downloads of the 1998 original. Oddworld Inhabitants is known for being generous