The 10th Victim - In the "near future," wars are avoided by pitting ten people against each other in something called the "Big Hunt." I'm not sure when this was supposed to take place, but the movie came out in 1965, so I'm using it.
The Running Man - Could still happen. Stephen King's (as Richard Bachman) tale of global economic collapse and subsequent government crackdown doesn't take place until 2025. So luckily there's still plenty of time to develop a game where the entire country helps hunt the on-the-run contestant. It also bears mentioning that the movie adaptation starring Arnold Schwarzenegger shares little with the book beyond the title and main characters' names (and it takes place in 2017...that's how close we are to Dweezil Zappa and Mick Fleetwood leading the revolution).
The Condemned - I'm honestly surprised something like this hasn't happened yet. It isn't like the average person cares what happens to someone once they get sent up, so why would making them fight each other be that big a stretch? Maybe I'm reading too many Houston Chronicle comment threads.