Here’s their description of the result of the checks, and here’s their lengthy writeup of the problem, what causes it, what it does, which versions don’t fail the check, and a fix for it. Both pages have animations of the bug in action. Here’s their patcher.

Here’s a tl;dr summary, although the most interesting part of it all is the reverse engineering and description of the problem. But in case you aren’t interested in that and just want the gist:

The original release came with a code wheel copy protection system, and performed a number of checks for the event that the protection was bypassed. A value was created as the result of the check, and was modified and stored in various other places. Each of the events itself checked one of those places against a second, obfuscated copy of the code wheel’s lookup table. If the original wheel check is bypassed, which happens for most of the versions of The Games: Winter Edition now, illegal or legal, those places won’t have the correct value, and the game will sabotage those events during play in different ways.

It’s really sneaky, and as it turns out, it also affects the GOG release of its sequel, The Games: Summer Edition in a similar manner, although cracks of that game managed to fix the sabotaged events.

rodneylives