Explain costume play plainly. Cosplay is all about dressing up and pretending to be a particular character from an comic book. This trend has become a massive trend amongst fans of geek culture internationally. Fans meticulously craft costumes and accessories that accurately reflect their favorite characters. Costume players often participate in events or costume play events, where they can display their artistry and meet others who share the same passion. In the end, costume play is an expression of appreciation and commitment for the fictional character and the love for the nerd community.