AFRO SAMURAI

This achievement will come naturally as you progress through the game and will unlock early on in the game. Skills are unlocked after collecting all the mementos in a mission or by earning enough XP, which is gained from killing enemies, to level up. I'm not too sure how xp is measured in this game but I got this achievement about 50% through School invasion (The second mission, excluding the prologue) on my first playthrough.

NOTE: Although these 10 skills can be any combination of memento skills or level up skills: the skills you unlock through mementos are unique to that set of mementos so to unlock all skills you MUST collect all mementos too!