OK, I realize we're now talking about a video game, but...
For those interested, this is the ACTUAL "Trolley Problem" as utilized by contemporary philosophy.
Scenario 1: A train is heading down the tracks into the maintenance yard, at full speed. For whatever reason, you are the only person in control of the tracks, and you know you can't stop the train. You have two choices: Send it on the left track, where it will strike and kill FIVE workers; or send it on the right track, where it will strike and kill ONE worker. What do you do?
Scenario 2: A train is heading down the tracks into the maintenance yard, at full speed. There is only one track. You and an overweight man are standing on a platform above the train track. You can either do nothing, in which case the train will strike and kill FIVE workers; or, you can push the fat man onto the tracks, which will kill ONE person, and will stop the train in time. What do you do?
There are numerous variations on this theme, designed to elicit particular aspects of morality and choice, lots of papers, lots of discussion etc.