Helo Can I make a map inspired by Carmageddon? Of course, I will change everything so that they don’t ban my game.
Unless I make an heir, name the game a different title and different maps, something like GRIP Combat 
Hey there @kkkkrthwthth! As long as you don’t use any of their intellectual property, a map inspired by Carmageddon is fine, but it must be your own work. Inspiration from the design is ideal but make sure it’s just a reference, not a remaster of a map.
Thank you so much, I was afraid that they would ban my game and I would go to jail. Can I make remasters of PSX games, with different textures, but the gameplay is the same?
You cannot make remasters, as that implies you own the intellectual property of the original game. You can always take inspiration from a game, and a “spiritual successor” is fine. Using anything from the original game can cause lots of legal issues.
For example, if you want to make a game like Carmageddon, that’s fine as you can make a game in the same genre and take inspiration, but if your levels are the same or thinly veiled copies, you will run into trouble.
I will make games that retain the heirs of the originals, with different texture maps.
Unfortunately different textures isn’t enough to avoid legal issues in most countries. I would recommend studying what made the game fun, and apply changes you think that would improve on the gameplay formula.
When I make a game, we will analyze it and improve it.