So far, my favorite game there.
You first go to the Portal Park, that have links for other games: http://maps.secondlife.com/secondlife/Portal%20Park%202/99/159/53
Go though the door and then to the Portal.
Once at the other side, you will get a Hud (that stands on the op left of your screen). That hud shows your progress.
Go through that stairs to the main area. Once there, you can see the tutorial. If you want to start the game, just go up the stairs on the right to the first platform.
Once at the platform, you can choose: take the train, or left click on the tp. There are 5 quests:
- Dino Falls
- The Great Lake
- Pirate Cove
- Out of Space
There are some walkthroughs on youtube, the best one I found is this one: https://www.youtube.com/watch?v=vHn8FIudKWo
Once you completed all quests, you can exchange for a prize that is no copy/ transfer, or Lindens (if you have payment info on file). Also there are daily linden prizes for collection blue and pink itens (no need to have payment info on file for those)
More info at: http://secondlife.com/destination/paleoquest