Massive L to Valve for not bringing Rosenberg back for Half-Life 2. I think he’d be one of the only people to not only put up with and enjoy Magnusson’s ramblings about his inventions or Mossman going on and on about her love of science and how she wishes she could work with Freeman and the gang in the height of their careers. I bet Rosenberg would tell Mossman all sorts of stories about what it was like and everything, and he’d smile and laugh about the fun they had and how proud they were of their creations and look down in shame thinking about the good friends he lost to their recklessness. Barney would still stick around him a bunch, feeling the need to keep an eye on him and take care of him ever since the Black Mesa Incident, and when Gordon got caught in a harmonic reflux at the start of Half-Life 2, Barney would turn to Rosenberg, desperate for some sort of escape, some way to get him out of there, and Rosenberg would turn to him, hoping he’d have come up with some miracle way to escape one all those years ago. They’d breathe a sigh of relief together when Gordon appeared unscathed outside the window, and Rosenberg would frantically start thinking up experiments with the miniature teleporter to try and figure out a way to make it never happen again. Rosenberg was a great character. I want him back.