This is a generalized category, which includes all the indoor games like basketball, snooker, chess etc.
Here is a basic description of all such games, also the pictures included with each category helps you in getting a better understanding of the sport.
The most common and well known indoor games are basketball, snooker and chess.
Out of these games chess is a mental battle game, which does not requires any physical stress but a lot of mental capability is tested through the game.
Basketball is a indoor game which requires a lot of sprinting and jumping.
Another very sophisticated indoor game is snooker in which two players compete on a table by hitting the ball with a stick, the winner is decided in the basis of points scored by them.