Are rockstar games achievements shared across titles?

I could not find any verified source that addresses whether Rockstar Games achievements are shared across titles. The only source provided concerns the singer Lisa and does not mention Rockstar Games or its achievement system. Because of this lack of evidence, I cannot confirm whether achievements are shared, unique to each title, or tied to a player’s Rockstar Games account. Further research from Rockstar’s official documentation or reputable gaming sources would be needed to provide a definitive answer.