Structurally it's similar to most reality shows. 13 people, one gets eliminated each week until one person is left.
Each week they play two 'games' - a main match to get a winner (who gets immunity) and a loser (who choses a non-immune person to play the in the death match). The death match is a 1v1 game to determine who goes home, but there is usually influence exerted by the remaining players on the results.
All the games are extremely logic-based compared to stuff you see on Survivor or BB. It's probably more akin to The Mole if anything, just without a mole.
