Laser Invasion

Laser Invasion
Also known as: Gun Sight (JP) Developer: Konami Publisher: Konami Platform: NES Released in JP: March 15, 1991 Released in US: June 1991 This game has regional differences. This game has anti-piracy features.

Laser Invasion is a rather ambitious first-person action game that tries to be a combat chopper simulator, gun shooter, and maze explorer all in one...on the NES.

All three gameplay types are reminiscent of other previously-released Konami games on the system: the chopper segments are very much like the Top Gun series (two graphics designers from the series are even thanked in the credits of this game), the side-scrolling shooting segments are like the ones found in The Adventures of Bayou Billy, and several Konami games such as Getsu Fuuma Den and the Ganbare Goemon! series had similar maze exploration segments.

While the game is built around a wacky headset controller, Konami's own LaserScope, it can also be played with a regular controller or the Zapper.

Regional Differences

Title Screen

Japan	US

Aside from the different title and coloring for the Konami logo, the Famicom version starts directly at the title sequence, whereas the NES version adds a copyright screen prior to that.

Options Menu

Japan	US

The options between the two versions are slightly different.

• The Famicom version doesn't support the LaserScope headset, since the peripheral was never released in Japan, so it's limited only to the standard controller or a light gun.
• The name given to the light gun peripheral differs between the two versions: "ZAPPER" in Laser Invasion, "GUN SYSTEM" in Gun Sight.
• Gun Sight has a password feature, while Laser Invasion instead allows the starting number of lives to be adjusted from 3 to 5. This change affects the cheat codes that are available for each version as well: In Gun Sight, the password 9PLY allows the player to start the game with 9 lives. This option is available in Laser Invasion by moving the cursor on the options menu to "players" and pressing B, Left, or Right 51 times (it doesn't matter which button is used).
• The Famicom version also has a hard mode that can be turned on by simply inputting HARD as the password. The NES version doesn't seem to have an equivalent cheat.

Briefing

Japan	US

The mouth on one of the animation frames of the soldier was touched up for the American version.

On-Screen Indicators

Japan	US

The on-screen indicators used during the combat chopper segments when approaching a supply stop or an enemy base were appropriately localized for their respective versions.

Japan	US

The text warning of defense walls nearby differ. Used at the end of stages 2 and 4.

Clear Screen

Japan	US

The mission clear screen in Gun Sight moves the helmet to the left in order to make room for the password given at the end.

Credits

Japan	US
GUN-SIGHT TEAM	STAFF-CREW
GUN-SIGHT / © KONAMI / 1991	SEE YOU ANOTHER MISSION.

The first and last lines of the credits differ.

Difficulty

Some enemies have more HP in Laser Invasion than in Gun Sight, specifically during the side-scrolling stages: the machine gun using enemies that appear near the bottom of the screen have 1 HP in Gun Sight but 2 in Laser Invasion. Similarly, the grey turrets have 2 HP in the Japanese version but 5 in the American version. This makes the US version more difficult during crowded situations and ammunition needs to be watched more carefully.

Continues

Continues work differently between the two versions:

• In Gun Sight, using a continue will take you to the last checkpoint you went through in a mission. The only real penalty is having your score reset to 0.
• In Laser Invasion, you're forced to restart the current mission, though to balance this out the number of continues is upped from 3 to 5.

Region Switch

Japan -> US Switch	US -> Japan Switch

Both versions have an internal region switch, though much simpler than the one found in Teenage Mutant Ninja Turtles III: The Manhattan Project. Game Genie code AEKVLZPA will switch the NES version to Japanese mode, while PEKTTZAA will switch the Famicom version to US mode.

When the region switch is activated, Gun Sight will switch the options menu to the version used for Laser Invasion and vice-versa. Only the names of the light gun peripherals will be left unchanged. However, the password support in Laser Invasion is non-functional and will freeze the game when used (making it impossible to use the 9PLY and HARD cheats). On the other hand, the 9-lives cheat from Laser Invasion will work perfectly fine on Gun Sight. The way continues work will also be changed as well.

The title sequence will also change slightly. While the title that gets formed will remain the same, the game will attempt to switch the flying letters to the ones used for the alternate title. However, due to different CHR data, they will not be displayed properly. This is because the Famicom version stores its katakana fonts where the NES version stores the flying letters, whereas the space for the Famicom version's flying letters on the NES version was replaced with placeholder tiles.

The language used for the cutscenes and dialogue will remain unchanged.

Copyright Screen

Japan -> US Switch	US

When the region switch is active, the Famicom version displays an extended version of the US copyright screen which credits Ultra Games, suggesting that Laser Invasion was originally going to be published under that branding by Konami. The finalized NES version was published under Konami's own label instead.

Mission Clear Screen

When Gun Sight is set to US mode, it will display the same mission clear screen used for Laser Invasion. However, when Laser Invasion is set to Japan mode, it will display an alternate mission clear which omits both the helmet and the password. This is likely a side effect of the password feature not being implemented in Laser Invasion.

Anti-Piracy

As with most of the games Konami has published after 1990, this game features a copy-protection routine: when booting, the game checks for the presence and integrity of a CHR bank with copyright tiles. Part of the copyright message screen contains the string "© KONAMI 1991", and the copy-protection routines check for that string.

If the test fails, the Japanese version turns on the hidden hard mode by default, where one direct hit kills you instantly. Strangely, the US version does all the same checks and sets the same flag...but has none of the effects due to hard mode being nonexistent in that version, even with the region switch set on.