The Master Chief is an iconic Science Fiction protagonist in the Halo video game Franchise which was released in 2001.
The Master chief AKA John 117 is a biochemically and cybernetically-enhanced supersoldier, raised and trained from an early age to be a weapon; he is almost faceless, never seen without his green-colored armor and helmet.
It is debated throughout the franchise whether the Master Chief is moreso human or machine, causing a deeper conflict within the character. This concept is explored whilst he endures endless missions saving what is left of the Human race.
In appreciation of Halo, a small plastic, air tight container with a green camouflaged exterior (much like the Chief's armour) has been placed. Inside the container is a log, pencil and some Halo items for swaps or keeps.
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