Isaac Godfrey Geoffrey Nabwana, popularly known as Nabwana I.G.G., is a Ugandan filmmaker and film producer. Nabwana, the founder of the film studio Wakaliwood, is best known for the gratuitous violence in his films. Nabwana started to gain fame after uploading a trailer for his film Who Killed Captain Alex? on YouTube in 2010 and later the actual film in 2015. The film has gained a cult status and as of April 2024, sits at 9.4+ million views on YouTube.

Who Killed Captain Alex? is a 2010 Ugandan action comedy film written, produced, and directed by Nabwana Isaac Geoffrey Godfrey (IGG), by Wakaliwood, an ultra low-budget studio in Kampala, Uganda. The film gained viral notoriety for being a no-budget action film, produced on a reported budget of under $200 although producer Alan Hofmanis later stated that the production value was in fact $85. A trailer for the film was uploaded to YouTube in January 2010 and the full film was uploaded in March 2015, and has been viewed over 9.2 million times as of 9 March 2024. The original version of the film was lost due to power outages and "strained conditions" according to Nabwana, while the surviving version of Who Killed Captain Alex? released online includes commentary from the first English-speaking "Video Joker" that includes running gags about the characters.