Contra 4

In 2638, a hostile group known as the Black Viper unleashes a deadly bio-weapon on Earth called the "Cyborg Process" which can convert humans into a machine-organism hybrid. Returning to the battlefield to stop this threat are series veterans Bill Rizer and Lance Bean. Players must battle through waves of alien and robotic enemies to reach Black Viper's base and defeat the final boss.

Contra 4 is a side scrolling run and gun, where you go from left to right through each level. The two Nintendo DS screens work together — as the character moves up or down, the camera shifts between both screens, requiring players to track action across both displays. There are different weapons (Spread Gun, Machine Gun, Laser, Homing Missiles) that can be picked up as temporary power-ups, and have their own firing patterns. The game is notorious for its hard difficulty – one hit will kill you, just like old school Contra. At the end of each level there are boss battles with pattern based attacks – learning the patterns of the enemy is key to survival. Limited lives and continues add to the challenge, encouraging players to master level layouts and enemy placements. A co-op mode is also available, letting two players fight through the campaign together for a more strategic, teamwork-based experience.

Select between two playable characters: Bill Rizer or Lance Bean. Use the D-pad/analog stick to move your character left, right, up and down through each level. Tap fire button to shoot enemies, dodge incoming bullets and obstacles. Use the jump button to jump gaps, pits and hazards. Collect weapon power-ups dropped by enemies to increase your firepower. To complete a level you have to defeat the boss at the end of each level and move on to the next. Play solo or join forces with a friend in co-op mode for two-player simultaneous action.

Download an emulator (melonDS or DraStic) from romlibrary.com according to your device (PC/Android). Download the emulator and fire it up. Set your controls in emulator settings (below). Load your legally owned ROM file into the emulator (File > Open ROM) Set graphics/sound according to your device’s performance. Launch the game and enjoy!

To play Contra 4, you can use these trusted Nintendo DS emulators (download from their official websites): melonDS - Very accurate, well to run on modern PCs, good dual-screen support. DeSmuME – Old reliable, good for lower-end PCs. RetroArch (DeSmuME core) – Best if you want to play multiple consoles in one application. DraStic Emulator – The best choice for Android Users.

Move Character — D-Pad Jump — A Button Fire Weapon — B Button Grapple Hook — R Button Aim Up — D-Pad Up Crouch — D-Pad Down Move Left — D-Pad Left Move Right — D-Pad Right Pause Game — Start Open Menu / Select — Select