First players to reach X total XP:

100,000,000	Oblivious	June 29, 2015	See rest
200,000,000	Oblivious	November 6, 2015	See rest
300,000,000	Oblivious	March 14, 2017	See rest
400,000,000	Oblivious	February 21, 2018	See rest
500,000,000	TBD		See rest