system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are video games based on movies usually terrible?

Edit: Thanks for the answers!
gpt
All About the money.

 They play on the success of the film to sell copies. If the film was a commercial success you can be sure the game tie in will be a success no matter how bad it is.

So movies makers know that the game sells just cause its a move tie in. This means they can put a low budget, and put minimal effort in and it will still make them a fortune.

ELI5: People buy the game cause its a tie in, Even if the games abysmal.