The pen is a writing implement that can be used to create notes and, in tight spots, as a weapon. The pen can kill zombies, but doing so will usually exhaust all of its durability; rendering it useless. Pens can be found in three colours, standard, red and blue, each with the same stats. A pen can be used with journals, empty notebooks and a sheet of paper to write notes that can be left for other players on Multiplayer servers. Maps can be annotated with a pen, adding symbols and text in the colour of the pen.