If you came here via the misspelled keyword "orenowakuchindakegazombieshitasekaiwosukueru free" , you now have the full context. The game is not for everyone—in fact, it's for very few. But as a piece of internet folklore, it’s unforgettable.
"Only my dick can save a world that has become zombies." (with "free" likely referring to a free game or downloadable content).
Always use a VPN and antivirus when downloading unknown files, and never share adult content with minors. The "free" version is a trial—if you finish it and want more, consider buying the full game to support the sole developer who built this zombie-filled world.
However, a playful (or accidental) typo replaces "ワクチン" (vaccine) with "チンコ" (penis) in pronunciation—hence "ore no wakuchin" vs. "ore no wakuchin" (same romaji, different kanji). The game leans into this ambiguity. The protagonist doesn't inject people with a medical syringe.