Know of a pen-and-paper game tuned/balanced for players who love "munchkinry" and "rules lawyering"--where not only is dedication to exploring the system and exploiting edge-cases expected and accounted for, but is basically the only way to have a shot of surviving at all? (As if the world was a high-level M:tG tournament, and a build that could win in three turns was just table-stakes.)
I’m not persuaded that any such animal exists.
Basically the only tabletop RPG out there that’s put together with enough mechanical rigour - not to mention enough attention paid to basic editing - to support TCG style play is Dungeons & Dragons 4th Edition (the 150 pages of errata stand as testament to that!). However, while it’s built to support adversarial play at the table (i.e., the GM stepping into the role of an opposing player and doing her level best to kill the PCs off), it assumes a measure of good faith during character and scenario creation that’s incompatible with TCG style optimisation. It’s harder than you’d think to break the game outright, but privileging mathematically optimal play is going to get very boring very quickly.
That said, there are games that take catering to TCG style character optimisation as an explicit design goal - games like Exalted 3rd Edition and Legends of the Wulin - but I’m not convinced that they can put their money where their mouth is design-wise. You need excruciatingly tight editing to properly support that kind of play, and both games could probably have used several more rounds of playtesting in order to get there.
(Which isn’t to say they’re badly put together; on the contrary, they’re perfectly cromulent games if you aren’t actively trying to break the system. They’re just not at the level of rigour you’d need to support a campaign where breaking the game over your knee is the whole point.)
