I vaguely remember a few holiday themed games over the years, but the best ones are the normal games that have hidden datelocked extra's. Like playing Meck Warrior over the xmas holidays you get santa claus hats on your mechs - which is fairly stupid, utterly pointless, and very funny in a daft and silly way.
For a few years I even set my date on startup to read xmas day just to find all the xmas bonus' you'd get in games - a side effect was that it worked great for shareware demoes too until they started checking time of day since last execution and preventing me from running them at all - since that started happening I no longer date lock my machine.
For a few years I even set my date on startup to read xmas day just to find all the xmas bonus' you'd get in games - a side effect was that it worked great for shareware demoes too until they started checking time of day since last execution and preventing me from running them at all - since that started happening I no longer date lock my machine.