Ocean doesn't even exist today as a publisher
Why do you think this is??
Don't get me wrong, I think that your brother had every right to use the cracked version considering he purchased the original, but you must remember that contrary to what you stated, the fixed version DID hurt people. Piracy is/was one of the largest problems among game developers and costs them thousands(if not hundreds of thousands) of dollars.
Piracy unfairly drives software companies out of business.
Even if Ocean was never purchased by Infogrames, you still probably would get no support from them, many companies do not support products that are older than 5-7 years. However, this still does not give you the right to pirate their software, even if it's ancient and out of date, and not a viable product anymore, you have to recognize that somebody still owns it, and it is their decision what should happen with their software, not the publics.
The best thing we can do is contact these companies who own the rights to Amiga software regularly, and petition them to bring their old, unsupported products to the Public Domain, or something like Back to the Roots.
BTW, if you didn't purchase 2 copies of Half Life (one for each machine) you are most likely in violation of their copyright also. Most software purchases are actually a license to use the program on one computer only.
