Just like on any console you can compare achievements/trophys (idk about playstation I assume they do it to) with other gamers friend or foe, randoms but the destiny version for grimoire. I check grimoire alot, even others grimoire but it's a hassle to see what they got that I don't got and would take too long to look through all of it. so I wish there was a grimoire compare like a big drop down list left side is you and right side is other person. Maybe even put reminders on some to?