His joke is that someone played in 2011-2013, on a PC running Windows XP, and there were interesting servers where people were hosting sieges on the Slopes map.
The same player returns in 2013/2014 (so if they were here in 2013 to begin with then they never left), they've grown a poo-stain beard, Windows XP is no longer popular, and all the servers are roleplays and begging people to join.
The player is upset.
Would be an alright piece of observational humour if the quality of the drawing, clarity of the text and the set-up were a bit better.