[LocalH]

In fact, you should feel no shame about actively preserving your particular copy of those games. You never know who has a release that has not been preserved.

Piracy is preservation. The only reason works are preserved tomorrow, is because somebody is pirating them today.

[Dalewyn]

The law explicitly permits making copies of computer programs for archival and backup purposes.[1]

You will run into legal problems if you try distributing those archives/backups, but simply making them for your own use is perfectly legal.

Obligatory IANAL.

[1]: https://www.law.cornell.edu/uscode/text/17/117

[PostOnce]

You can't (practically) though, they all require internet activation and are very hard for a layperson to crack (if one isn't available for download)... they're effectively coasters unless deep skill and time are invested in the cracking (which is usually the case but maybe not always).