Math is great as a way of learning to think about formal systems, and there's a lot of useful things to learn from it.
If you're thinking of going on to grad school sometime, you might want to go math-heavy. That's likely to make you stand out, partly because it's generally easier to be a computer science major than a math major, and partly because it's a good foundation for learning more theoretical stuff.
There are parts of math you definitely want to know, but much of that will likely be taught in a Computer Science curriculum. I would hope yours had some more or less disguised math classes in it, teaching things like complexity theory and graph theory.
For videogames, you definitely want more math. You need to be very good at linear algebra, and need to know calculus. You need to know geometry, trigonometry, and algebra, but these (at least in these forms) aren't typically college classes. Differential equations may or may not be useful. You don't need a degree to show for it (although a math minor would be useful if you're looking to work with somebody else), but you need to know it, and I don't know a better way of learning it than college courses.