Please be as specific as possible when letting us know what is missing or incorrect. For example, say "this game's trophy difficulty should be 8/10", with a link to a website corroborating this difficulty estimate (if possible), not "this game's trophy difficulty is wrong".
LEGO Marvel's Avengers - Demo does not have any trophies. This is because it is a demo and/or soundtrack, neither of which typically get trophy lists. The full (i.e., paid) version of the game likely has a trophy list.
Playable on: PS4 only Avengers Assemble! The best-selling LEGO Marvel videogame franchise returns with a new action-packed, Super Hero adventure. Join the LEGO Marvel's Avengers team and experience a videogame featuring characters and storylines from the critically-acclaimed films and more. Play as the most powerful Super Heroes in their quest to save the world.