The father of redditor fightingcrime carved and painted a Risk game board onto a coffee table, thus providing fun and frustration for his family for years to come. It appears to be a variant of the game with more routes and territories, including Svalbard, the Philippines, and the Falkland Islands. I’ve played this variant many times and agree: it makes the game more challenging and more fun.
The best take on Risk that I’ve played is Succession Wars, a board game set within the BattleTech universe. Although Risk often ends up becoming a political struggle, Succession Wars has intrigue and treachery built in.