"Grand Theft Auto V" players on the PC version of the game claim they are being banned from the game and they do not know why. Many think it is because they are using modifications to alter the game, Kotaku reports.

User-made mods have made the PC version of the game more interesting and gives it more variables. However, players do not know if "GTA's" developer, Rockstar, approves of these mods.

In "Grand Theft Auto IV," mods were popular and Rockstar allowed gamers to use them. This meant custom cars, better graphics, special guns and more.

Check out this video to see some of the "GTA IV" mods.

It is unclear on how Rockstar will respond to mods for "GTA V," but it looks as though instead of banning them outright, the company will just ban users that use them in multiplayer modes, meaning single player mods should be legal.

Players are worried and confused, though. They have gone on Reddit and Steam forums to ask whether mods are recommended or if they should avoid them.

Some Reddit users have heard of players getting banned for using mods in the single player modes.

Players are afraid of being banned, and Rockstar has not given an official answer on what it thinks of mods. In the "GTA V" end user license agreement, mods are not acceptable, according to players. Playing the game means users agree to not use mods.

Other players say that "GTA IV" had the same EULA, and they were able to use the mods in that game. Many players think that Rockstar will only ban players that have mods that really alter the game or change the coding of it.

Players who have been banned from GTA V may have been tampering with the game, removing or adding values to the game's code and putting items into the game that do not belong.

To keep things simple, Rockstar could just place a ban on all mods and warn players that if they use mods they will be banned. But, players have already enjoyed some of the mods they have created like guns that fire cars instead of bullets.

Game Spot recently sat down to talk about the past, present and future of mods.