Looking at your games collection,
Vaesse's Game Collection, I see Rapture Rejects listed if I uncheck the 'Exclude not owned' setting. The other 2 do not show up.
Looking at your Steam stats for Rust - Staging Branch, I see you have no achievements in the game. The easiest way to get a game to show in your collection is to unlock at least 1 achievement.
Hero-U is where it gets weird. While it doesn't show up in your games collection, it does show up in your games list,
Vaesse's Games. And why it's doing that, I couldn't tell you.
Hopefully another staff member will jump in here and explain what I cannot.
65 LEGO game completions on 6 different platforms across TA, TT, and TSA! Over 3,700 achievements and trophies earned in LEGO games!