Some gamers choose to buy video games second hand instead of buying them brand new. It is a more cost effective choice if the games are undamaged and it means you can buy more video games for your money!
For some gamers, this is not an option simply because they want to get the latest games first. If, for example, you want something like the latest Resident Evil game, or Halo Infinite right as it launches, you will probably need to buy the game. And not just that, you will usually need to pre-order it too.
Many video games are now available online so you might also be able to play some of your favourites without having to buy a physical game. This is good for some people, but not for others who might like to have a collection of games. You can also rent games as a cost effective alternative.