First players to reach X total XP:

100,000,000	Big Boone	January 12, 2016	See rest
200,000,000	Big Boone	March 31, 2018	See rest
300,000,000	Big Boone	April 15, 2018	See rest
400,000,000	Big Boone	January 15, 2019	See rest
500,000,000	TBD		See rest