Contra Force

Contra Force is an action shooting game released by Konami for the NES in 1992 in North America. It is a spinoff of the Contra series, being the third game in the series released for the NES following the original Contra and Super Contra, although the game's plot and setting are unrelated to previous entries, as the villains in the game are human terrorists instead of an alien menace.
The game was scheduled to be released in Japan under the title of Arc Hound, with no ties to the Contra series, but was canceled.
In North America, Contra Force was announced as the third console game in the series, being released sometime prior to Contra III: The Alien Wars (known as Contra IV at the time). However, Contra Force was delayed to a late 1992 release, a few months later than Contra III, causing the latter game to be renumbered prior to release.

Original description:

LEAD A FORCE OF COMMANDOS STRAIGHT DOWN TERROR'S THROAT!

Commandos Burn, Smith, Beans and Iron are a special forces team who have seen more than their fair share of action. Neo City is their post, now that a terrorist group known as D.N.M.E. is bombarding its citizens with a typhoon of a crime wave. The C-Force has been asked to stop them, no matter what. Take command solo or team up with a comrade in 2-player mode. Even if you go it alone, you can call on a backup soldier for spot support. Tap into your special forces training to devise unique battle plans and attack patterns, select weapons, and decide which soldier's individual strengths are best suited for the dirty deeds going down. You can switch commandos whenever the situation calls for it. Endure all 5 grueling missions, swarming with traps and terrorists, that take place in a warehouse, on a battleship, at a construction site, aboard a helicopter, and at C-Force headquarters. Encounter secret passageways, hidden rooms, aerial angle views and more. Every man is a walking arsenal with heavy-duty weaponry including rocket launchers, flame throwers, bazookas, rifles, land mines and time bombs. This mission is no cakewalk, but if it was, they wouldn't have given it to you. Hit it with all you've got!

Instructions

Enter - start (pause);    Space - choose new weapon;    Arrows - move;
Z - jump;    X - fire;    Esc = exit fullscreen;

You can change keyboard settings, save (F5) and load (F8) the game.
Put your mouse over the game and choose your settings, you can also play the game in fullscreen.