Diary of a Camper is considered to be the first example of machinima. It was produced in 1996 with the engine for the computer game Quake. The film is brief - less than 2 minutes - and features no voice acting whatsoever - all dialog is given via text. The game uses language and situations specific to video games - the term "camper" in this sense refers to a player who remains in one spot to pick off his enemies. The term is negative in connotation and campers are often considered unskilled.
The story is very simple. Five players belonging to the Ranger clan are scouting a map. Two members are gunned down by a camper. The other three realise this and, from a safe distance, kill the camper. As a punchline, they approach the camper's corpse and realise it is none other than John Romero!