I thought the game was complete utter trash. The movie, god... all I've gotta say was that was the most expensive sleep I've EVER taken. Back to the question, like it's been said already, because the first one made money... and because it's got 'Lara Croft' in it.
Like how my friend described the Tomb Raider games:-
T.Raider 1 - Big Tits, Big Ass
T.Raider 2 - Bigger Tits, Bigger Ass
T.Raider 3 - COMPLETELY oversized tits & ass!!!
Personally, I happen to love the Tomb Raider games. You just have to accept it for what it is. There's no denying that when the first TR game went out, it blew all other games away.
People just started to compare it to games that basically copied and improved the Tomb Raider game. People just expected more.
About the film version, I thought the movie was pretty bland. They should get a different director or something for the sequel. Because the last movie didn't actually capture the games' feel. The first scene of Angelina was actually right on the mark. Then I was dissappointed when they revealed that it was just a practice room. Sheesh...
I sure hope they could redeem themselves in the sequel.