Wannabe detectives will be transported back to 1921 as the city centre is once again turned into an interactive Cluedo board.
More than 200 people have signed up to take part in an event that is a cross between the classic murder mystery game and Pokemon Go.
Organised by Bedfordshire company CluedUpp, the murder mystery is returning to Aberdeen once again after its first event in the city last February.
Organisers say that this year they have drawn inspiration from hit TV show Peaky Blinders.
Teams of up to six people will vie against each other to solve a murder case set in the 1920s.
It involves people scouring the city centre meeting virtual witnesses using a smartphone app.
CluedUpp’s founder Tref Griffiths said: “The latest storyline Sneaky Finders is inspired by the BBC hit drama Peaky Blinders and, as such, detective teams taking part will be tasked with solving a complex murder case set in the 1920s.”
He added: “We are huge Peaky Blinders fans here at CluedUpp and with a new series due to start again soon what better time to release a game inspired by the era? We can’t wait to see if our detectives are up to the challenge of solving our hardest case yet.”
A spokeswoman for CluedUpp added: “We have already had 40 teams sign up for this event, which means over 240 people taking part. We, of course, have some return detectives eager to solve our new mystery.
“Along with our brand new story Sneaky Finders, we have a new app for our wannabe detectives which features hidden witnesses, runaway witnesses and witness questioning.
“We are very excited to be launching these new added elements to the game.”