The Tomb Raider franchise turning 15 means one important thing:  We're old.  The good news is, to celebrate the anniversary, fans can ogle some amazing galleries depicting Lara Croft over the years.  The artists include Toby Gard—who designed the original version of the busty heroine—and Brian Horton, who is working on Lara's latest incarnation.  Check out the awesome art here and happy birthday, Lara!  

[via Joystiq]