Vice: Project Doom, known in Japan as Gun-Dec (ガンデック), is an action video game developed by Aicom and published by Sammy Corporation for the Nintendo Entertainment System. The game was released in Japan on April 26, 1991, and in North America on November 15, 1991. Vice: Project Doom is a side-scrolling platformer with noticeable similarities to the Ninja Gaiden series for the NES, with the addition of gun shooting and driving segments as well. The player assumes the role of a secret agent who must uncover a conspiracy involving a new kind of alien substance.
Vice: Project Doom consists of 11 stages. The very first level, as well as Stage 10, are driving stages, while Stage 4-2 and 11-1 are shooting stages; the rest are standard side-scrolling/parallax-scrolling stages. Each begins with a movie-style sequence which provides the game’s narrative. As usual of the genre, the player has a health gauge and a limited number of lives. Unlimited continues are provided as well.
In the main stages, Hart can switch between one of three weapons: a Laser whip, a .44 Magnum revolver, and a supply of M-24 Stick grenades. The laser whip is a short-range weapon that can be used infinitely, while bullets and grenades are limited and must be replenished by picking additional supplies dropped by defeated enemies. Other power-ups include Meat and other health-restoring aids, and as well as coins that will give the player one extra life for every 100 collected. In the main segments, Hart can jump, attack, crouch, and climb ladders like in most other action games. He can also run while crouching.
In the vehicle stages, the action is viewed from an overhead perspective. Hart drives a Ferrari F-40 red; the player maneuvers the car through the road while shifting between three gears and shooting at enemy vehicles with the car’s equipped gun. In the shooting segments, the action is viewed from Hart’s perspective. The player moves the target indicator around the moving scenery, shooting the gun with one button and tossing grenades with the other. The game’s stages are Route 246, Waterfront (Construction Site), Chinatown, Port, Ricardo Range, Warehouse 0001, Train and Sewers, Power Plant, Bio-Tech Laboratory, Harbor, and finally the BEDA Corporate Headquarters.