Everyone at your birthday party should be familiar with the Hunger Games books and movies. For this event, you’ll need to divide the party-goers into districts (teams of 2 or 3), just like in the books, and have the participants compete to see who survives the Hunger Games.
You can create any type of challenges you want, but they should have some similarity to the movie, like a bow & arrow (plastic) shooting contest, food foraging, walking on a beam, climbing walls, dodge ball, etc. You can award points for each challenge completed within a certain allotted amount of time or for each challenge won.
For example, give the teams two minutes to shoot a plastic arrow through a ring from a certain distance. The team who gets the most arrows through wins the challenge and gets 5 points. Others who complete the challenge successfully but get fewer arrows through get 3 points. Those who don’t get any arrows through the ring in the allotted amount of time don’t get any points. When the contest is complete, there should be one district that comes out on top.