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.