|Full name||Nikolaos Costas|
|Appears in||Criminal Case|
|First appeared||Case #4: Murder's Cheap (s3)|
Nikolaos is a 42-year-old economic advisor who worked with the victim. He wore a white-collared shirt with sunglasses hanging off it, a badge of the Greek flag and a YES badge. It is known that Nikolaos knows Greek mythology, eats olives and knows how to sail.
Events of Criminal Case
Nikolaos was first spoken to by the player and Jack after they found a note with his handwriting saying to meet with the victim. He was shocked at hearing of Demetrios' death, saying that he could not afford to die now with the country being broke. When asked if he met the victim last night, he said he was at the Ministry crunching the numbers the whole time.
Nikolaos had to be interrogated again after the team found a collection of articles about the victim, with a message from his advisor on it. He said the victim was more into wife swapping than credit swapping, and he had to give him some tough love. When Jack suggested he killed him to give him some tough love, he said he would have if the victim stayed in his office long enough and did not go out every night to party.
In the end, the evidence pointed to Nikolaos as the killer of Demetrios. Nikolaos had firm and absolute beliefs that Metaxas should be held liable for Greece's financial disaster. He went far by assuming that Metaxas's financial irresponsibility would only breed bankruptcy and anarchy, so to financially stabilize Greece, he had to resort to murder. Nikolaos also believed that Metaxas was a weak leader due to the wanton financial woes Greece is currently experiencing, but Jack made one thing clear: kill and be caught by the Bureau, and get sent to Judge Adaku for trial.
Judge Adaku recognized Greece's financial turmoil as he started the hearings, to which Nikolaos brought up the concept of a Unified Europe to stabilize Greece financially. Judge Adaku vehemently disagreed with what Costas said, as his beliefs are less violent since he cares about the riots in the Netherlands, not to mention a murdered prince previously. In spite of Costas's defense, Judge Adaku opted to put the financial advisor away for 30 years. Jack was kind of confused after the verdict as there were some things he liked about Costas, although there were also some things he did not like about him. Unlike the previous cases in which the Promethians were involved, Costas did it for fiscal responsibility and strong leadership.
- Nikolaos resembles Venezuelan president Nicolas Maduro.