Longest videogame marathon playing a third-person shooter

Longest videogame marathon playing a third-person shooter
Who
Michael James
What
28:0:0 hour(s):minute(s):second(s)
Where
United Kingdom (Reading)
When

The longest videogame marathon on a third-person shooter is 28 hours, achieved by Michael James (UK), in Reading, UK, from 22 to 23 March 2013

The attempt took place on the Xbox 360 game Gears of War: Judgement.