Despite popular opinion, I don't think any kind of spoiler can truly ruin your experience with any game.
Before I ever started playing the original No More Heroes I knew all that it had to offer. I knew it was one giant joke, a playful jab at the entire medium and those who love it. I knew about the purposefully empty open world, that Travis Touchdown was a blatant otaku, that he fought with a “beam” saber, and that he was a parody of the stereotypical gamer. I knew about the over-the-top action, the insane bosses, and the game’s embrace of a retro 8-bit style. I thought it sounded awesome and expected to enjoy it, but I hated it. I hated the jokes, I hated Travis, I hated the side jobs, the open world, the Lucha Libre masks, and grinding for cash.
I’ve often wondered what made me hate the game so strongly in those first few hours, and I believe I hated it because the game was spoiled for me. Much of the game’s charm stems from the joy of discovery. Not “discovery” as in environmental exploration but rather the discovery of an unexpected gem of a game. That experience was spoiled for me by the expectations that I had going in. Most talk of spoilers center around plot twists but even a discussion of the experience can spoil a game. And yet, after the wonderfully anti-climatic battle with Letz Shake, I started to warm to No More Heroes. By the time that I heard that robotic voice announce my impending fight with Harvey Moiseiwitsch Volodarskii, I was enjoying myself. And by the time I finished the game, its crazy charm had made me a fan. Despite that joy of discovery being taken away from me, despite all the hate I had for the game, I still came to love it, and I believe that speaks to just how inconsequential any kind of spoiler is to video games.