Trophies are awarded for certain activities and milestones. Typically, it is accompanied by the addition of favor points. Currently, there are over 100 Trophies in classic vw and 40 Trophies available in Old Blood.
Unfortunately there is a glitch with 6 Old Blood Trophies.

 

All 6 Trophies above are not listed in our inventory.

Another glitch: When looking at another player's stats page, you will not be able to see any of the other player's Old Blood Trophies.