The first case, for example, will lead you to a party in which you'll have to infiltrate, dress up as waiter and serve a certain guest a glass of poison, while in the second one we'll have to take some photographs.
The game is played in first person and, although it is played in a similar way to classic shooters, most time of the game will remind you to platform and point&click games. Jump from platform to platform, search for objects and use them to help you.
Gravity Bone is a free, funny and entertaining game with a peculiar graphic apart. Give it a try.