Tidbits

1. On the bridge in the 'Pyramid of Osiris', you will see a skeleton dressed in the clothes of Nathan Drake in Uncharted 3: Drake’s Deception.
   
2. In Lara Croft and the Temple of Osiris, there are two 'Iron Jeweled Fetish' amulets but with different properties.
   
3. As of 2015, the DLC weapon, the Toxic Dart gun has the image of two pistols. When the toxic dart gun is used, the player will notice that the weapon is probably supposed to be named the Toxic Pistols, rather than Dart Gun.
   
4. Lara’s in game model is made up of 77,444 polygons.
   
5. There are 12 levels in total and there are 241 collectibles to find.
   
6. According to Ron Rosenberg, the team was planning to add in a system where players could create their own tomb levels, however, it was cut.

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Sources

No. 6
http://www.gamesradar.com/10-cool-facts-you-never-knew-about-the-tomb-raider-games