While people who know me would think that it is Bioshock 2 for a ton of issues, but that is mostly because it is automatically compared to Bioshock, ARK: Survival Evolved for its issues but I have 9k hours in it and growing so I can't say that, or the horribly disappointing Baldur's Gate after I finally got to play it years after and it kept giving me migraines. No. The worst game I ever played was also one of the most beautiful and beautifully animated arcade games, Dragons Quest. You had to match your movements to certain flashes on the TV and between input lag, multiple inputs reading as rejections, and frequently flaky controls the game was impossible for all but the most rich to get past the first 2 or three prompts. I on occasion saw a player who had pumped a couple of hundred of dollars into the machine to figure out its quirks and know when it was broken and they actually got somewhere. I never did. The same happened for the less successful Space Quest which was the same machine with a new cabinet, broadly speaking.