Duck Hunt

Freeze targets:
Press Start to pause game play, then resume. The targets will remain paused for a brief amount of time, allowing an easy shot.

Duck control:
Use a standard controller in port one to control the ducks. Note: This may be done when one or two ducks appear on screen.

Hint: Always hit the duck:
Place a magnifying glass between the light gun and your television screen. Hold the Light Zapper gun approximately two feet back from the television and fire whenever a duck appears. Aiming directly through the center of the magnifying glass and towards the center of the television works the best. Several attempts may be needed to get the gun and magnifying glass positioned correctly. Note: A fairly powerful magnifying glass was used to discover this trick.
Information in this section was contributed by Floyd Eaton.

Put the Light Zapper on the duck you want to hit. Your accuracy should be perfect. When you destroy all the ducks in that level, you should get a Perfect bonus worth 10,000 points.
Information in this section was contributed by Ben Springer.

Use the back of the Zapper as an aimer. The notch at the back acts as crosshairs.
Information in this section was contributed by Jason Hogan.

To easily rack up a huge score, split the video from the NES out to two televisions; one normal sized used to watch the game and a smaller television to aim at. Just hold the Zapper a few inches from the screen, wait for the ducks to appear, then pull the trigger. You will hit your target every time.
Information in this section was contributed by cory.lawson.

Hint: Mirror challenge:
You can shoot the Zapper at the game game from a mirror. For example: you can use a large mirror and put it across the screen. While you shoot ducks, you can shoot them from the mirror.
Information in this section was contributed by SSJTrunks215.

Hint: Fun challenge:
Start a single player game. Then, use the "SUMMON FLARE" code, look in the air, and throw it. When it gets directly on the crosshair in the middle, shoot with the AutoMag.
Information in this section was contributed by SAP.

Glitch: Duck color:
The ducks you shoot, no matter what their color, are always green when the dog grabs them when they land.
Information in this section was contributed by Fumblingkc.