How about a sequel to this movie, "The Game 2" ?
Nicholas gets so mad to his brother (as he should be),he goes along with a smiley face for a couple of months but secretly plans a Saw-ish death trap game and executes it on his brother.
But if there would be a plot twist at the ending and Nicholas stops the game just before the blades cut off his brothers head,it would be so easy to predict for both Conrad and the audience of the movie.Conrad would go like "Oookay I made his life miserable so he is making me feel like exactly how I made him feel,will this end already ?"
But no,there will be no plot twist and the game will actually kill him brutally.In a second thought,that would be the plot twist.
If there are any different ideas for a sequel,I would like to hear :) I know,my idea is unrealistic and crazy but I can't see a "game" planned out if Nicholas doesn't get mad
Sorry for the english