Isn't that much of what games are about? Perhaps you'd benefit from specifying more tightly the kind of excersice you're after?

"get better at rationality" is a great goal; but how do you judge better rationality vs. less? Isn't there an implicit "better informed / more rational" judge implied by the nature of it? Is that going to be you? A council of Elders? A consensus of whoever shows up? Will that really meet the standard?

Twitch games and war optimize for speed of decisions, and if its not a correct decision you just try again or die. Often thats the most rational choice in that context, but it wouldnt be in others...