Contra (Arcade, NES, MSX2, DOS, C64, CPC, ZX) (1987)
First game in the series. Many of the series' convention such as power-ups, two-player cooperative gameplay and the character's light mobility (including somersaults) were already present in this game. The game is composed of traditional side-view stages that scroll either vertically or horizontally, as well as "3D view" stages in which the player moves towards the backgrounds. The NES version is essentially identical to the arcade version in terms of content, but has longer stages and other modifications. In Japan, the Famicom version uses the VRC2 chip, which allowed for additional background animation and cut-scenes not included in its North American NES counterpart. An MSX2 version was also produced that is drastically different from the other two versions. Several computer versions were done outside Japan, by Ocean in Europe for the C64, CPC and ZX, and by Banana Software in North America for DOS based PCs.
Super Contra (Arcade, NES, DOS, Amiga) (1988)
Super Contra replaced the "3D view" stages from the original with "top-view" stages similar to those in Commando or Ikari Warriors. Features unique to the arcade version includes upgradeable weapons and the ability to control the character's jumping height. The NES version (retitled Super C for its North American version) has three new stages and a new final boss, but lacks the upgradable weapons from the arcade game. Unlimited Software created DOS and Amiga conversions for the North American market, based on the arcade original.
Operation C (Game Boy) (1991)
The first game made specifically for a portable platform. Featuring gameplay similar to the NES version of Super C, Operation C is the first game to make the machine gun the player's standard weapon. Operation C also first introduced the "homing gun" power-up.
Contra III: The Alien Wars (SNES, Game Boy, Game Boy Advance) (1992)
The series' first entry for a 16-bit game console, Contra III allows the player's character to climb into walls or railings and carry two weapons that can be switched back and forth, as well as smart bombs that kill all on-screen enemies. Many of the stages and bosses made use of the system's Mode 7 graphic effects, including a bike riding stage that ends in a midair battle with the main character riding missiles. The player is now required to rotate their character in the top-view stages to move along with the scenery. Two heavily modified portable ports were produced. A port for the original Game Boy simply titled Contra: The Alien Wars, and a later Game Boy Advance port titled Contra Advance: The Alien Wars EX, which replaced the top view stages with levels from Contra: Hard Corps.
Contra Force (NES) (1992)
Contra Force combines the run and gun style of the Contra series with a power-up system similar to the Gradius. The game is notable for being the first Contra to feature selectable characters with their unique weapon configurations. Contra Force lacks the alien invaders and futuristic environment of previous installments, as the game centers around an elite task force fighting human terrorists in a present day setting. The game was actually planned as an unrelated game in Japan as Arc Hound, but was never officially released there, nor in Europe.
Contra: Hard Corps (Mega Drive/Genesis) (1994)
The first Contra game for a Sega platform. Hard Corps also contains selectable characters with unique weapons and abilities and introduces an in-game storyline with branching paths that alters the ending.
Contra: Legacy of War (PlayStation, Saturn) (1996)
The first of two Contra titles developed by Appaloosa Interactive, as well as the first attempt to convert the Contra gameplay to 3D. Was originally sold with a pair of anaglyph glasses. The first console Contra game to be released in the PAL region with no changes. A Japanese release of Legacy of War was planned, but canceled.
C: The Contra Adventure (PlayStation) (1998)
The second Contra game developed by Appaloosa. The gameplay is composed of several side-scrolling and 3D stages, as well as a single overhead stage. It's the only console game in the series to lack a multiplayer mode. C: The Contra Adventure was only released in North America, with no Japanese nor European versions.
Contra: Shattered Soldier (PlayStation 2) (2002)
Features 2D side-scrolling gameplay with fully polygonal 3D graphics. The player now has a fixed weapon configuration, allowing the character to use one of three weapons. The player can also charge their weapon for a more powerful shot. The game grades the player's performance on each stage and only allows the good ending to those with an above-average rank.
Neo Contra (PlayStation 2) (2004)
The first game in the series to be composed entirely of overhead stages. The player can now select their weapon configurations, which includes a weapon that locks onto airborne enemies.
Contra 4 (Nintendo DS) (2007)
Developed by WayForward Technologies. The gameplay is displayed on two screens and the player's character now has a grappling hook that latches onto railings. The gameplay system is modeled after Contra III, with upgradeable weapons similar to Super Contra. It also features the return of the 3D view "tunnel" stages from the original Contra. The game has never been released in Europe.
Contra ReBirth (Wii) (2009)
Developed by M2 and published by Konami for WiiWare. This new 2D side-scrolling game was released in May 2009 in Japan and features Bill Rizer and Genbei Yagyu from Neo Contra fighting off an alien invasion.
The original arcade versions of Contra and Super Contra were ported to several computer platforms in North America and Europe during the late 1980s and 1990s. In North America, the original Contra and Super Contra (as Super C) were ported to DOS. A version of Super C was also released for the Commodore Amiga. Contra was released for the DOS, Amstrad CPC, Commodore 64 and ZX Spectrum in Europe under the Gryzor title.
As software emulation become more widespread, the classic Contra games, both arcade and console installments, are being made available in numerous formats such as downloadable game services like the Wii's Virtual Console and Xbox Live Arcade, video game compilations, stand-alone re-releases and even as unlockable games in newer installments. Mobile Phone versions have been produced as well. For more information, see each individual game page.
 Cancelled games
Contra Spirits 64 (Nintendo 64) (Canceled)
Originally announced in late 1998, this Nintendo 64 incarnation of the series was to be developed by Konami Computer Entertainment Osaka, but was later canceled when the development team disbanded.
 Other appearances
Konami Wai Wai World (Family Computer) - Although released a month before the Famicom version of Contra, the final boss theme is the game is the same one used in the original Contra.
Wai Wai World 2: SOS!! Parsley Jō (Family Computer) - Bill Rizer appears as a playable character among other Konami characters.
Snatcher (Sega CD) - The English localization features two characters masquerading as Bill and Lance at a Konami-themed costume party held at the Outer Heaven night club.
Nanobreaker (PlayStation 2) - Jaguar from Neo Contra appears as a hidden character.
Best Student Council - A Konami-produced TV anime series. Pucchan's other hand puppet friend in episode 19 is named after Lance Bean, a nod to the Contra character.
Pawapuro-kun Pocket 8 (Nintendo DS) - One of the minigames is a Contra parody.
Źródło: http://en.wikipedia.org/wiki/Contra_(series . Ludzie błagam! Sprawdzajcie w necie zanim napiszecie na forum!
PS. Znalezienie tego zajeło mi kilka sekund.