Game for Master System

VersionDateByDownloadSource
1.0111 Apr 2013MrDGravityBeamMasterGaiden-SMS-1.01.zip (185KB)GravityBeamMasterGaiden-SMS-1.01-src.zip (703KB)

Competition Entry

This was a competition entry in 2013

Old Versions

file namesize (bytes)
total 1 file185K
GravityBeamMasterGaiden-SMS-1.00.zip 185K
Version
1.01
Platform
SMS
Type
Game
Released
20130411
By
MrD
Screenshots
2
Source
separate
ShowOldVersions
true

:ForumTopic:14161

GRAVITY BEAM: MASTER GAIDEN

2013/03/25 by Mathew Carr (aka MrD)

About

Gravity Beam: Master Gaiden is a new game for the Sega Master System.

Story

It is the 33rd century. Humanity continues its colonisation of the Red Planet, Mars. Colonists and miners have worked tirelessly for many years, excavating caverns of unimaginable scope throughout the core of the planet in search of elusive subterranean minerals.

This devastating work is viewed with contempt by many fringe groups in colonised space. Private security and intelligence forces are stretched to breaking point protecting those trying to tame the Red Planet.

One group in particular, claiming to be allies of the 'guardian daimon' of Mars, have struck many savage blows against the colonisation effort, attacking mining facilities, dormitories, miners, engineers, scientists and their families indiscriminately. They claim that the colonisation efforts are causing irreparable damage to the natural ecosystem of Mars, and demand that humanity leave at once.

Admist all this madness, a terrorist cell activates after a decade-long infiltration into the heart of colonial governance. They take a number of key colonisation personnel hostage. Their demand: the absolute abandonment of Mars by the human race within twenty-four Earth hours.

The security forces deal with the immediate threat after a bloody and protracted siege... but, with his final words, the leader of the cell leaves a chilling warning...

"You may think you have won, but you can -never- win. We have planted a nuclear device in the heart of Mars. A device capable of annihilating the entire planet."

"The bomb is armed."

This is where you come in.

You are an ace pilot. The best. Your trusty ship, the Greenwing, is equipped with a state of the art Gravity BeamTM, capable of hauling any cargo through the most treacherous terrain.

With only minutes before the bomb detonates, you fly directly into the caverns of Mars...

You've never had to carry a nuclear bomb before, but how dangerous can it be?

Your mission:

be detonated safely.

GOOD LUCK, pilot. And GODSPEED.

Controls

For the best game play, learn the different button functions before you start.

Directional Button (D-Button):

On the main menu, press up or down to navigate the menu options. In-game, press right or left to rotate your ship clockwise or counter-clockwise.

Button 1 or 2:

On the main menu, press Button 1 to select menu items. In-game, press Button 1 to engage or disengage the Gravity Beam when in range of the crate. Press and hold Button 2 to engage thrusters and move your ship in its current direction.

The function of Button 1 and 2 can be swapped on the main menu.

Pause Button on the Power Base:

In-game, press to pause the game; press again to resume play.

Hints and Tips

Move slowly: the bomb is fragile!

Allowing the bomb to collide with the cave walls will damage it! When the box starts blinking, you know you're in trouble. The box will blink faster the more it is damaged. If the bomb incurs enough damage, it will explode!

Even getting it caught on something may be enough to destroy it. If the box gets stuck, detach from it immediately!

Remember your mission: don't place the box on the landing pad! We don't want it!! You have to drag it out into space. To do this, fly your ship out of the caves through the opening at the top of the screen near the starting position while the Gravity Beam is engaged.

The Gravity Beam has a maximum distance before engagement. You can only engage the beam if you're within about four ships' length of the box.

The Gravity Beam has a maximum length during engagement. If the box swings too far away from your ship, the Gravity Beam will be disabled and the box will go flying across the landscape.

The box is pretty heavy; if you're moving at speed and you make a sharp turn, the box might drag you into danger!

Your ship is indestructible, as are the cave walls. Colliding with the walls brings your ship to a dead stop. Use this to your advantage.

The box falls rather slowly through open space.

While you're attached to the box, you will see a dotted line between the Greenwing and the box.

Credits

Additional maths routines detailed in maths.z80asm

If you'd like a 500 DPI printable full bleed version of the cover to print out and put inside a real Master System keep case, I've got you covered, just ask. :P

Tiled Map Editor (mapeditor.org) was used to create the levels.

Written in Z80 assembler. Assembled using WLA Z80 Macro Assembler v9.5, written by Ville Helin. Linked using WLALINK Z80 WLA Macro Assembler Linker v5.7, written by Ville Helin.

Custom tools synthesized from the luminiferous aether as per requirement.

Many thanks go to the denizens of SMS Power, without whom this game would not have been possible.

Emulators used:

Licence

Gravity Beam: Master Gaiden, Copyright (c) 2013 Mathew Carr

All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.



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