thank you for your concern, @tox123! we already have been creating tag synonyms, merging tags, and setting tags for automatic removal, but as you said, there are too many of them unfortunately!
you may as well help us remove redundant tags by suggesting synonyms to them or by removing them form questions through edit suggestions!
I renamed the [gameoffifteen] tag to game-of-fifteen and merged the questions tagged [fifteen] into the renamed tag. A tag synonym for "fifteen" is not necessary because text completion will show users the correct tag to use.