This time the weapon items are now labeled 'A', 'B', 'C', and 'D', which will vary depending on the character controlled by the player.

Like in previous games, weapons are obtained from flying capsule pods. The player can now carry up to four different weapons, as well as a supply of bombs. The character will be invulnerable while sliding and can even harm certain enemies. A new ability added to the game is a sliding technique performed by holding the direction-pad diagonally downwards while pressing the jump button. The player can also jump down from certain platforms, as well as move on walls and ceilings like in Contra III. By pressing the weapon change button while shooting (or the X, Y, or Z buttons on the six-button controller), the player can toggle between two shooting styles: one which allows for free movement while shooting, and another which keeps the character still while he or she aims in one of eight directions. The three main buttons (A, B, and C) are used for switching between weapons, shooting, and jumping respectively in the default control configuration. The controls are similar to Contra III, but have been adapted to work with the Genesis's standard three-button controller, as well as the six-button controller.

Like in the previous Contra games, a maximum of two players can play simultaneously, but they are not allowed to choose the same character. A new feature to the game is that the story is advanced through story cutscenes. Another difference is the player can now choose between one of four unique player characters.

Unlike previous Contra games, which featured overhead segments in addition to the regular side-view stages, all the stages in Hard Corps retains the standard side-view perspective for most of the game. While most of the game have the character walking on foot, certain stages have the player riding a Motoroid, a hoverbike that can transform into an ostrich-like robot. The objective of each stage of the game is to reach the end by shooting at every enemy that gets in the way, and fight the boss awaiting at the end. _ Ability to save and recall the game at any point of the game you want. _ Direct execution of the game, without the need to download data and simulator.

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