Mechanics

Misc. Explanation of Mechanics

Character Movement

Go right.  Don't jump(if possible).  When you jump you lose a frame of forward momentum.  You also lose a frame of forward momentum when you land when you walk off an edge.

Spread Rhythm

With the spread gun, you can have up to ten shots on the screen at once (and 16 shots at once with two players).  Press B twice and you'll usually end up with 10 shots on the screen - two waves of 5 shots.  Let's say that three shots have left the screen before the other shots did.  You've got have 7 shots on the screen so you're below the 10 limit.  The game will let you fire another "wave" of spread, but it can't go above 10 so you get a "wave" of 3 spread shots.  Let's say that you then had 8 shots on the screen, the next time you fire you get a "wave" of 2 shots and so on.  The directions the shots go depend on how big the "wave" is, but it always has a shot going straight.  The idea is that by rhythmic shooting you can get the "waves" of spread to shift into a straight stream.  If you don't press the B button repeatedly at the right frequency the smaller waves will go offscreen and you'll get the broader waves of 5.

The process is the same for base stages, but it's much harder.  Shots will usually disappear at the same time because they all hit the wall at the end of the hallway at the same time.  If a shot hits an enemy or another object those enemy'the collision happens before the other shots hit the wall.  You have 1/60th of a second to press the B button to get another wave off before the rest of the shots hit the wall.  Keep repeating the process to get a straight stream of spread.   If you don't press the B button repeatedly at the right frequency the smaller waves will go offscreen and you'll get the broader waves of 5.

Weapons and Damage Values

 

 Stage 5 Snow Field Bomb Jump

 

 Stage 6 Exo Strat

 Timings for the flames in stage 6 and claws in stage 7

 

 

Regional Version Differences

Timing

Runs done on the Japanese version of Contra can save a significant amount of time over runs done on the U.S. version.  This is due to the way that the Japanese version handles stage transitions screns.

Japanese Version: As few as 11 frames to skip to the next stage

U.S. Version: 225 frames to skip to the next stage

 

 In the Japanese version, there is a cutscene for each stage and then the stage is shown on a map.  Both of these screens may be skipped instantly by pressing the start button.  Assuming you pressed the start button twice at the precise moments, you can advance to the next stage in 11 frames in the Japanese version.  The U.S. version has a hard limit of 225 frames between each stage.  This is where the stage number and your score is displayed.

Other Differences All other version differences are graphical and as best as we've tested do not affect gameplay.  

 

Glitches

Stage 3 Jump Glitch

 

Stage 4 Boss Quick kill