Lara Croft's large breasts were the result of an accidental mouse click!

Wanting to stray as far from any Indiana Jones imagery as possible with Tomb Raider, video game developer Core Design originally chose a strong South American female as their lead character. Lead artist Toby Gard chose the name ‘Laura Cruz’, but, seeing as Core Design had recently been acquired by another British company, upper management preferred something a bit more ‘Brit-friendly.’ Therefore, the team voted on names from a local phone book, with the winner being ‘Lara Croft’.

After modifying her backstory to fit the new name, the developers had to create a digital model of their heroine. It took just over 540 polygons to complete her figure, and the end result was the most realistic in-game character that had been seen at the point! With her long braid, tiny shorts, and twin pistols at her sides, Miss Croft was ready for action. All along, Gard had intended to give his adventurer somewhat exaggerated features, but her hefty bosom was actually a complete accident. While adjusting her figure, he increased her bust size THREE his intended 50% adjustment! The enhancement was met with unanimous approval from his team before he was ever able to change it back...and so a teenage video game fantasy was born.
(source)