I don't understand. It shouldn't take you longer than 5 minutes to figure out how to watch dvd's on Ubuntu. First google result: https://help.ubuntu.com/community/Re...ts/PlayingDVDs
Games, on the other hand, well, if you didn't mention which games and if they're even supported by Ubuntu, then we can't help. But if they're not linux-native games, that's like asking why Windows-native games don't work on OSX.
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