Sink Or Swim!, also known as Pickup 'N' Drown!, is a mission in Grand Theft Auto 2 given to protagonist Claude Speed by Scientist leader Dr. LaBrat. The mission is available from the left of the two green Scientist phones in Dominatrix of the Residential District.
The Zaibatsu have stolen SRS information. Dr. LaBrat hires Claude to capture the Zaibatsu Operatives, regain the lost info and kill them.
The reward for completing this mission is $30,000.