Just finished the first season and the entire thing was awesome. Yes, there were unfair eliminations in the beginning, but that's where the title "Devil" made its premise - there's a devil in each of us where you value yourself more than the group.
Least we forget that the game can have only one winner, and everyone wants to be that winner - no matter in the game or in life. Your methods can be anything as long as its within or even UNSPOKEN by the rules. Relying on others, be selfish or betray and climb over your fallen allies, the methods are not limited as long as it take you one step closer to victory.
The premise aside, the games and puzzles suggested in this show were easy to understand but difficult to execute. As much as every one of the games gives a fun tickle to your brain, the pressure comes down when its all about elimination and your standing in the game. Ironic how it also reflects to real life situations, eh?