Games is refering to the pokemon games in the pokemon franchize. All of the normal games are canon just like the pokemon anime and pokemon adventures. The games are slipt in generations. Each generation has new pokemon and a new story. curently there are 5 generations (5th generation coming soon). There is also some other games that are not split into generations. Those games are puzzle games, pokemon ranger games, pikachu games, and mystery dungen games.
Every Game past Here is Different from the main series and is non canon.