well finished the game the day after i got it is it relly finished that quick.or is there more after the boat and the flash back to the island with lisa. and if so is there another game

nope that was it you can re-play the differents part of game. There are some achievements you can try to get if you did not get them the first time did you see the medical staff site nothing downthere but scenery first time i played did not see that. but no that was the end of game.