The following weapons were used in the videogame Heavy Rain:
IMI Desert Eagle
Both a shoplifter and Mad Jack use a stainless steel finish IMI Desert Eagle. The gun appears to be similar to the one portrayed in Modern Warfare 2, as it has several serrations on the barrel which make it appear to have an integrated rail mount.
Private investigator Scott Shelby uses a Beretta 90-Two as his personal sidearm. This is the most featured gun in the game. Jayden keeps one similar to Scott's in his car's glove box, and the gun is used by SWAT when they storm the motel. The bodyguards in Kramer's mansion also use this gun.
Beretta 92FS Inox
Norman Jayden carries a Beretta 92FS Inox in the game. This seems to be Jayden's personal gun as the FBI does not issue Inox Berettas. Jayden's gun also appears to have blued controls and seems to have either wood or brown synthetic grips.
Beretta/Taurus Hybrid Gun
For one of the Origami Killer's trials in which he is forced to kill a drug dealer, Ethan Mars is provided with a stainless steel gun that appears to be a combination of a Beretta 90-Two and a Taurus PT92.
Police detective Carter Blake carries a nickel plated SIG-Sauer P226 as his sidearm. He is seen drawing it several times, most notably during the rooftop chase at the hotel.
Beretta 3032 Tomcat
A Beretta 3032 Tomcat is used by Madison Paige at Paco's nightclub. Mr. Kramer also attempts to draw a gold plated version to defend himself when Scott assaults his mansion.
A Colt M1911 is used by Paco, the nightclub owner, and Nathaniel, the Christian zealot investigated by Blake and Jayden.
Mary Smith uses an unknown revolver in an early tech demo of the game. This gun is not featured in the final product.
A drug dealer uses a hybrid shotgun to attack Ethan Mars during one of the trials. The gun shares some features with a Remington 870 MCS, but has a wood stock that does not exist on the actual Remington.