My game is much more superior to yours.
Can we use much more in this sentence?
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Don't say: My game is *much more superior to yours.
But say: My game is far superior to yours.
This is because superior is a non-gradable adjective. Non-gradable adjectives can't be used comparatively or superlatively. (In other words, you can't say or write more superior or most superior in comparison sentences.)
Most grammar books would cover gradable and non-gradable adjectives. The British Council also has a page for it.
Some dictionaries also let the reader know whether an adjective is gradable or non-gradable. For example, the Cambridge Academic Content Dictionary makes it clear that superior is [not gradable], as shown in the image below: