The best age restriction technique that I've ever had to overcome was built into the greatest DOS game of 1987, Leisure Suit Larry in the Land of the Lounge Lizards, where on start up it asked you for your age (you had to be over 18) an you got asked trivia history and sporting questions that only people of that age would know the answer to, and you had to get three of them right before being allowed to play.
This protected my innocent little mind for years until the secret cheatcode Alt-X to skip the verification was provided to me(note: if your 11year old plays leisure suit larry they will grow up disturbed)
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but did it run linux?
The best age restriction technique that I've ever had to overcome was built into the greatest DOS game of 1987, Leisure Suit Larry in the Land of the Lounge Lizards, where on start up it asked you for your age (you had to be over 18) an you got asked trivia history and sporting questions that only people of that age would know the answer to, and you had to get three of them right before being allowed to play. This protected my innocent little mind for years until the secret cheatcode Alt-X to skip the verification was provided to me(note: if your 11year old plays leisure suit larry they will grow up disturbed)