Now this is not going to be easy.
Because of the lack of greatness in my desciption. <_<
This game aimed towards the kind of game play like myst. But it held the camera back in 3rd person. You gathered items to progress through the game. Such as, i remember being in a junkyard having to sneak past guys on watch. And siphon gas out of this car. The main character is a real bad ass. He gets gas in his mouth and spits, while the a tower in the background swiped a light by.
For any that might ring a bell XD. HOpfully

You traveled by bike. In a desert i remember mostly. For the first part of the game atleast. I distinctly remember, racing down a highway strip between two canyon walls. This is no action this is all your beside wat now? Everytime i'd whip the chain on him. He would end up laying in the reck, the camera would face towards the fallen rider and he would press a button in his hand and the reck would blow.
I know why i fought that guy is because i needed his; Bike, Outfit, Key, etc.. I remember there being some doorway to something special.
I plaid this game about 6 years ago. It wasn't terrible graphics. Because it was all planned out. OH ANd i remember you, i think, that something about a tree house and it being the main characters... i think...
Like i said im terrible <_<. If you have any ideas. Just say anything. haha