Gabriel Roman is the secondary antagonist in Uncharted: Drake's Fortune. He is voiced by Simon Templeman. Roman first arrives while Drake and Sullivan are exploring the wreckage of a Kriegsmarine U-boat beached in the Amazon Rainforest. Roman, leader of a group of pirates and mercenaries, has loaned Sullivan a large sum of money in the past. Sullivan had called him, assuring him that he would soon find "something big", and then have the money to pay Roman back. Roman, however, decides to steal the information that Drake and Sullivan have gathered and find the treasure for himself. To force Drake into compliance, Roman holds Sullivan hostage, and eventually shoots him, nearly fatally. Roman discovers the directions to El Dorado, but fails to capture Fisher and Drake.
Roman forces Sullivan to work with him in finding the treasure. Despite numerous warnings that the treasure and the island are haunted, Roman continues to use his men in search of the treasure. Roman captures Fisher, but Drake and Sullivan catch up to him, just in time to see Roman about to leave with the statue. However, Navaro tells Roman the real treasure is inside the statue. Roman opens the statue to collect the riches inside. As soon as Roman does, he is cursed and zombified. Navarro shoots Roman in the head, revealing that he intended to sell the statue as a weapon the whole time.
Source: Wikipedia, "Gabriel Roman", available under the CC-BY-SA License.