DesignThe Ruiner is based on the third generation GM F-Body (seen in the period's Pontiac Firebird, and Chevrolet Camaro). It has a T-Top roof, with either glass or solid panels installed. The semi-concealed pop-up headlights, and the front fascia are similar to the 1983-19Nissan 300ZX (Z31 Series). The taillights and trunk spoiler are shaped like those of the Camaro, but the area between and below the taillights better resembles the Firebird, with "IMPONTE" and "Ruiner 450GT" positioned where the Firebird logo would be. The ground effects on the front end are reminiscent of 1985-1990 Pontiac Trans Ams. The wheels resemble those of the Mitsubishi Starion, and the added pillars on the rear window may also come from the Starion.
All Ruiners feature "RUINER" decals and stripes along the lower part of the doors, much like that of the Camaro IROC-Z, although the stripes and decals share colors with the ground effects, much like 1982-1984 Trans Ams. Some Ruiners also feature an offset cowl induction hood, strikingly similar to those found on 1982-1984 Trans Ams and 1985-1992 Firebird Formulas.
The Ruiner is powered by a large 7.3L V8, coupled to a high-performance 5 speed gearbox in RWD configuration. Acceleration is very good, close to cars with a much higher price tag. Its top speed of 191 mph is also excellent; brisk, yet controllable. The suspension is moderately firm, giving the Ruiner much needed grip in the turns, while still loose enough to have some fun with. Handling-wise, the Ruiner is a stellar performer, with constant grip, little fishtailing, and a lot of torque. Braking is very good, if not the best in its class, and ABS comes standard. Crash deformation is acceptable, but not great; the Ruiner can be disabled after only a few crashes.
Ivan Bytchkov drives a unique Ruiner during Ivan The Not So Terrible. It is painted black with uniquely bright yellow trim. The car may appear with one of a variety of iridescence paint tints, including, but not limited to, red, blue, and gold, making the car's body color unique.
The car can be obtained after Ivan abandons his car. However, the player must get in the car to save its identity as a car driven by the player. The player may continue to chase Ivan after getting in and out of the car. If done, it will be in the middle of the street where Ivan abandoned it after the chase. Note that whichever car the player chased Ivan in will despawn. Due to the nature of the chase, Ivan's Ruiner will be damaged, but will not be severe enough as to inhibit it from being driven to the player's safehouse.
- In Grand Theft Auto IV, the default radio station in the Ruiner is Liberty Rock Radio 97.8.
- Ruiners feature license plate frames that say "Ruining Imports Since '67". 1967 was the year GM debuted the F-Body. This gives further evidence that the Ruiner is based on the Chevrolet Camaro and Pontiac Firebird, as 1967 is the year that they were both introduced. This is also possibly a reference to the Vigero, which is based on the first generation Camaro.
- Spawn around Northwood, East Holland and North Holland, Algonquin.
- Spawn around Chinatown, Algonquin.
- Spawn around Alderney City, Alderney.
- Spawn in traffic in multiplayer.
- Spawn in northernmost driveway on Concord Ave, Dukes in multiplayer.
- Spawn around Cerveza Heights.
- Spawn more often if the player is driving a Stallion.
- Spawn around Fortside, Bohan.
- Spawn around downtown Broker.