That Time You Killed Me

You and your opponent are rival time travellers trying to erase each other from history. To prove you are the one true inventor of time travel, you must use your invention to find your enemy in time and murder them — before they get you! Unfortunately, since your enemy has strewn many copies of themselves across the timeline, you may have to do the terrible deed many, many times before it sticks. Just make sure you don't get erased first!