The 'All I Know Is That I Must Kill' meme originated from a YouTube video titled 'Doom in a nutshell' by animator ArhyBES, which parodies the iconic Doom video game series. It features a simplified, MS Paint-style Doom Slayer waking up in a confused state, only to immediately embrace his primal urge for carnage. Since its release in 2014, the image has become a staple in gaming culture, frequently used to describe the experience of jumping into a chaotic situation without context or simply waking up with a singular, aggressive focus. Its humor stems from the sharp contrast between the character's total lack of identity and his absolute, unwavering certainty in his violent purpose.