Explain cosplay heart in layman's terms. Costume play refers to dressing up and pretending to be a particular character from a video game. It has become a huge sensation among fans of geek culture internationally. People carefully craft outfits and props to accurately portray their favorite characters. Costume players often attend events or costume play events, where they can showcase their creativity and connect with others who share the same passion. In the end, cosplay is an manifestation of admiration and dedication for a fictional character and the love for the nerd community.