Week 3: Game ideas

I have to make a game that consists of:
1. No fighting \ guns \ weapons
2. The player cannot be killed
3. The player must use skills of logic and deduction to win the game
4. The game must be based around a plot of mystery or exploration
5. Puzzles should be a central part of the player experience
6. Has to be made in UDK
I have been using UDK and the unreal engine 3 since 2007 and I am very familiar of  what the engine consists of and its capabilities. As the game cant have any fighting or guns\weapons I will have to remove the default gun that the player is given when they spawn in to the game. The player cant died  in the level so I will have to toggle god mod on when the player enters the level, but if for some reason the player falls though the level will the kill z volume still kill the player? The puzzles in the game cant be to complicated as I want any one to be able solve the puzzle but I also don’t want the puzzles to be easy and boring. Having a mystery story that goes with the puzzle could work to an advantage to keep the player interested. To advance the plot of the story the player needs to solve the puzzles and without solving the puzzles the player will not solve the mystery. Giving the player the opportunity to explore the level instead of having puzzle after puzzle can help to create a better atmosphere of the level, as the player has the freedom to walk where they want, but its also important to let the player know where they need to be heading to advance the story.
Basic Game Ideas:
Idea 1: Murder mystery where the player is a detective and needs to find clues to solve a murder. Each clue will give the player a hint on who did it. The culprit is randomly selected each time the player plays the game and the clues change each time as well.
Idea 2: The player wakes up for a deep frozen sleep on a military bases where everyone is dead, your goals is to escape. While escaping you start to uncover what happen to the military bases and why you where there.