[Honey]

I would say this is a very hard question to answer, personally because I wouldn't simply call one game "the best", every game is good and interesting in its own way, For example, the game I've spent the most time on, might not be the "best game" for me, but simply a game that keeps me engaged for long times(such as CSGO)

Coming to your question, I'd say that Halflife is a "part" of the best games list, but there are many that I can't simply forget including Ezio's Trilogy