Spanning unnecessary Alchemy in Baldur's Gate 3 to Assassin's Creed Valhalla's useless social stealth, these are more pointless game mechanics nobody used.
No matter how closely you watch the games industry, there's always something that suddenly blows up and makes you ask "wait, what is this and why does everyone love it?!".
All it takes is one simple choice to doom a franchise. So many classic video games are dead and buried because their publishers made the wrong one, from Ghost Recon to Star Fox.