No Game player would want to see the game he has just bought with so many bugs that it is impossible for him to play normally. In this situation, many bugs would be seen as a production shortcoming and the new game that has just been launched would have to be taken out of the market, just like if it was a defective electric appliance.

In order to prevent this unfortunate event, game companies have lots of Quality Control and Beta game tester people to identify and note all bugs that should be fixed. Ideally, all bugs should be corrected, but it is not always the case as game companies have to meet deadlines for the release in the market of their products.

It would be economically impossible to fix everything and testers have to know what minor or major bugs are in order to classify them and prioritize what is necessary to fix. For that reason, computer bugs have been grouped in four categories, which are: the A bug, the B bug, the C bug and the D bug.

The A bug is the worst of all and has to be imperatively corrected before the game is released. Not doing so would mean the death of the new game and a complete financial disaster for the game company. What is considered as a A bug? A game that crashes or has a computer virus will be at the top of the A bug classification. A game with spelling mistakes, graphical or audio problem, or a non-working feature would follow.

The B bug is the following most important issue that can be seen in a new game. The team of experts working on the game may discuss to decide if the bug is worth the time and money to be fixed, or if it just can be left as it is. If the bug does not break the gamer's pleasure to play, and has only minor graphical or audio problems not compromising the overall of the game, the flaw may be left untouched.

The C bug is a slight issue in the coding of the game that would be a plus to correct. If the bug is a breeze to eliminate, it is reasonable to think that it will be done. If it is challenging and requires too much time to fix, the issue will not be addressed depending on the game producer's decision. The game tester may feel that the bug he has identified should be fixed, but economic constraints decide otherwise.

The D bug is more a feature request than a bug in itself, and would be a nice addition to the video game. If the report of such a bug was made well in advance in the testing process, it will be possible to add the feature. If it was reported close to the launch date of the newly created game, it will not be added.