I have fond memories of playing educational games back when I was young (~10 years ago), like Mutanoid Math Challenge, Operation Neptune, Gazillionaire, and so on. They had these wacky, colorful premises like facing off in a math contest against weird-looking aliens so that Earth wouldn't get drenched in slime. (In this game the math contest consisted of solving simple algebraic equations, arithmetic, that sort of thing; grade-school stuff.) Are there any games for college-level math? (I mean games that are inherently entertaining, but where solving math problems (or physics problems, or something like that) is crucial.) I remember doing searches a few times for games like these, but couldn't find anything. I'm thinking about something like an upgraded version of Operation Neptune. The original game consisted of you moving about in a sub, collecting artifacts and having to solve math problems that pop up to either move to the next level or open up something, problems that had to do with submarine stuff like "Your sub is leaking fuel at 2 liters/hour. If you currently have 40 liters of fuel, in how many hours will your sub be out of fuel?" The upgraded version would have question like "Let x(t) be the amount of fuel in liters in your sub. Your tank is leaking fuel at a rate of dx1/dt = k*x liters per hour, and your engine uses up fuel at a rate of dx2/dt = 5 liter/hour. You currently have 40 liters of fuel, and your engine will fail once x < 1 liter of fuel. Determine how long your sub can last with its engine on." Obviously, you'd need a pencil, paper, and a calculator, but I think a lot of people would like a game like this.