Inertia (BBC/Electron) -
Inertia (1990) (BBC/Electron, Cassette) United Kingdom
Publisher: The 4th Dimension
THD/Alex Boy | The 4th Dimension | The 7th Division

Genre: Arcade; Clone Of Marble Madness

Cover Art Language(s): English

Machine Compatibility: BBC Model B, BBC Model B+, BBC Master 128, Acorn Electron

Release: Professionally released On Cassette (Side 1


Available For:
Acorn Electron, Archimedes A3000 & BBC B/B+/Master 128

Compatible Emulators: BeebEm (PC (Windows))
Model B Emulator (PC (Windows))
Elkulator 1.0 (PC (Windows))

How To Play

A flick-screen isometric graphic adventure in which you collect up tiles. Beware of misleading instructions on both the BBC and Electron packaging.

Game Information

Original Release Date: 10th Apr 1990
Original Release Price: £9.95
Market Valuation: £23.89 (How Is This Calculated?)
Weight Boxed: 64g
Box Type: Cassette Double Plastic Clear
Author(s): D. Postlethwaite  

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What They Said

"Inertia is an addictive little game that will keep you coming back for more." (Read Full Review)
... Acorn User
"The idea is simple but it is well-implemented and capable of keeping you hooked for hours." (Read Full Review)
... Electron User
"We have come to expect quality software from The Fourth Dimension and the company has not let us down with Inertia." (Read Full Review)
... The Micro User

Critic Score

82%based on 3 review(s)

Audience Score

100%based on 3 vote(s)

More Screenshots (29)

Cover Art

Front Cover

Multiple Versions

This item contains versions for BBC B/B+/Master 128 and Acorn Electron.
The screenshots shown are for the BBC B/B+/Master 128 version of the game.

Where To Get It

A digital version of this item can be downloaded right here at Everygamegoing (All our downloads are in .zip format).

Download What It Contains
A digital version of Inertia suitable for BeebEm (PC (Windows)), PcBBC (PC (MS-DOS)), Model B Emulator (PC (Windows)), Elkulator 1.0 (PC (Windows))
A digital version of Inertia suitable for BeebEm (PC (Windows)), PcBBC (PC (MS-DOS)), Model B Emulator (PC (Windows)), Elkulator 1.0 (PC (Windows))
A digital version of Inertia suitable for BeebEm (PC (Windows)), PcBBC (PC (MS-DOS)), Model B Emulator (PC (Windows)), Elkulator 1.0 (PC (Windows))



Inertia is a totally original game with a huge landscape just waiting to be explored. It is available for the Archimedes, BBC Micro and Acorn Electron. Scattered (or rather fiendishly placed) around the landscape are many special tiles which need to be collected. Your highly sensitive craft floats freely around the landscape and you must exert forces upon it to guide its speed and direction.

You have a three dimensional viewpoint displaying a tiny fraction of the total playing area. There are walls, bridges, tunnels and ramps to negotiate and a host of mystery tiles with strange properties indeed. These include ice, jump and transformation tiles. There are even certain tiles which alternate the controls so that everything works in reverse!

This massive game has been very carefully put together and solving the puzzles within it will need lateral thought and a lot of dexterity.

The Archimedes version is considerably enhanced with digitised sound and music. It even features a full colour three dimensional map of the game which is a joy to wander around. You'll certainly be amazed at the size of the game and the variety within it.

Inertia is a game for the determined. Each version makes full use of the ability of the computer so make sure you've got plenty of time to spare. Once you have started you won't be able to stop.

Game Objective

The aim of Inertia is seemingly quite simple. You must guide your craft over all of the shaded tiles whilst avoiding falling off the landscape. The landscape is made up of a very large number of 3 dimensional varied screens. However, as you progress, the going will get very tough. A good memory and/or mapping will certainly be needed.

Playing Guidelines

Various icons along the top of the screen depict the sound status, which craft is in play, pause on/off, and the current direction of the controls (normal/reversed). The two vertical bars at the sides of the playing area slowly fill up, first the left, then the right. If a shaded tile has not been collected before the time elapses then you will lose a life. The timer is reset each time a tile is collected.

The panel to the lower left of the playing area shows the number of lives remaining. A life is gained for each tile collected, and a maximum of 12 lives is allowed. The panel to the lower right of the screen gives an indication of the number of tiles left to be collected. Your current score is shown above this. You score five points for each tile collected and you lose three points for each life lost.

When you lose a life you continue the game at the place where you last collected a shaded tile or sometimes at the last but one.

Special Tiles

The further into the game the craft progresses the more features it will encounter. Most tiles are easily recognisable - some you will have to learn by trial and error.

Ice   It is important to alter the direction of the craft whilst on this
Jump Tiles The craft is thrown into the air
Checkered Tiles The craft loses control of its brakes
Vertically Striped Tiles The craft may only alter its vertical direction
Transformation Tiles These transform the craft between its two possible states. The first, normal craft, is fast and light, but loses control on some surfaces. The second, smaller craft, is slower and heavier, but retains control on most surfaces, including the ice
Direction Squares These swap the control keys - left becomes right, up becomes down, etc

Game Controls

The craft is controlled using the following keys:
Z - Left, X - Right, : - Up, / - Down, RETURN/SPACE - Stop
P - Pause, S/Q - Sound On/Off

The direction keys alter the speed at which the craft is travelling in that direction. The craft may fall any distance and will bounce off most of the walls. It may gain/lose height by traversing the ramps. The ramps and blocks are joined together in various ways, constructing towers, tunnels, trenches, etc.

Inertia is Item ID 146 in our database. Last modified on Tuesday 2nd March 2021 at 05:33:20 AM.

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