Talk:Achievement System/@comment-34688566-20180319192916/@comment-33335049-20180320042035

This Reddit post might interest you. So according to said Reddit post, there are 824 total achievements (+1 for Lv. 300 Summoner Avatar for Ortus sphere, which the post wasn't updated for, so 825). Subtract the 152 from Level Up Campaign and you get 673.