To get the quad bike in lara's home go into the libary . walk to the book shelf in-line with the fire.



You will see a book that sticks out more than the others. press action and lara will pull it, then turn aroundand you will see the fire has been put-out.



Face the left hand side and you will see that you can climb up it.at the end of the chimny you will encouter boxes.



Shift thEm and pull the switch on your right

then sprint down stairs and on your way to the gym, you will see that a new door has been opened.



Enter itand you wiil see a passage way go down it and you will find an aquarium.



Shift the box and enter it{the aqurium}and then swim arond the floor and you will see a key, collect it.



Go out in to the grounds and will see very tall bushes go up to the lock and in side the bushes is a go-kart.