Almost every RPG ever published with the possible exception of Rolemaster but I think that was just a hge pile if charts. Last saw it in maybe 86 so memory is fuzzy.
But I am not sure I have ever seen a more obscure and overly mechanical for no gain RPG than AD&D 1E RAW - which is how we ran it because we were raised to feel cheaters were bad so you run the rules or you’re a cheater and don’t get to play. We were preteens and up till high school freshman and the idea that being a cheater who changes the rules might be ok and not cheating didn’t occur to us.
So we just slogged through. Granted I rarely was willing to play AD&D once I found The Fantasy Trip and then Champions.
But since 1981 I am not sure I have seen a more complex RPG. I did see one that had one section that was complex - Other Suns that used trigonometry to do star ship fuel and travel times. The rest if the game was simple.
But peopke who say AD&D 1E wasn’t crunchy because they ignored all of the rules weren’t playing AD&D 1E. They were playing their own system.