Some background info split into three sections, Spoilered as its identical in each topic to save the same questions being asked, perhaps please read have a skim read once.
Preamble
Spoiler
This was initially planned to be about 10 "of the well known" but the list started to grow to 20 then 30... I had to be sensible so it is now only 21 games, otherwise it could of grown to about 100 or more.
I'm aware there are some perhaps 'better' candidates for this and also that some of the games I played do actually exist on platforms I have not tested. The reason for this is as I worked with what I "had to hand" already plus what I could find easily and actually loaded without too much difficulty.
For example I did have a couple more Oric Atmos games and some more MSX versions too, however as I was unable to get them to load I had to discount them which was a bit of a shame unfortunately but I did not want to waste too much time hunting more versions down. In general, if the version I had to hand did not work and one or two attempts (say a tape and a disc version) obtained from elsewhere did not function despite adjusting emulation machine type settings etc then I ignored that game on that machine.
Its not really a group review as such, perhaps in some ways it could be considered 'mini comments' about each game as I saw them, errors and omissions excepted! I'm also purposely not covering our versions of these games here. I do point out some differences between versions where I noticed them but this is merely for reference such as playing speed and controls etc.
Emulation stuff
Spoiler
Amstrad CPC464 and CPC6128 via the CPCE95 and WinApe emulators
BBC Micro Model B and Master 128 via the B-Em and BeebEm emulators
Commodore Plus4 and C64 via the Hoxs and Vice emulators
MSX and MSX2 via the BlueMSX emulator
Oric Atmos via the Oricutron emulator
Spoiler
I did not run one emulator then each game in turn and play, as I'd likely forget anything specific about it between each variant! Instead I did it the harder way. One game tested on each platform in turn, taking a few screenshots and making very brief notes as I played. No real attempt was made to play them too hard or for too long, merely enough to get a feel for them in their different environment and how they were. Had I played with one emulator and each game, I may of lost thoughts about some of them when it came to using a different emulator for the next round, so although it was a lot more work I think it was worth it.
The comments on each version are not always in alphabetical order in each topic, this is by machine playing order rather than design as I used one text file per game for all machines and it does not reflect any form of rating, that being because a machine is first or last in the topic does not make its version of the game any better or worse.
Spoiler
If you get half as much enjoyment from viewing the screenshots and reading my short comments on how I found each variant to be and perhaps posting a reply or two I'm happy.
Please enjoy!
BBC
Emulator: BeebEm
Intro offers (during load like some other BBC games) the option to redefine the keys, effectivly "poking" the values in.
The loading screen is quite well drawn and makes good use of colour for this platform.A different loading screen is displayed on another version too.
The game plays quite fast, a bit faster than the ZX and its also more difficult too, with ladders being a bit more difficult than usual to jump onto horizontally.
The levels colour choices are sensible and not unpleasant to look at and the graphics do not appear too pixelated given the lower resolution the game runs in.
There is only one 'baddie' the smaller character but unlike other variants he is able to climb back up ladders and jump across gaps.The horizontal 'wave' on some of the levels is missing so less accurate timing is needed however the conveyors and the deadly items on them are a bit faster.
There's no item collection sound, the game otherwise sound-wise is relatively identical to other versions.
AMSTRAD CPC
Emulator : WinApe
The loading screen and introductory screen menu closely mirror the ZX version, as expected.
There is good use of sound and there is an item collection sound present.Some of the level colour choices can perhaps be described as a bit unusual!
The game does play quite well and its feel does mirror the ZX version except the controls can sometimes be a bit slow. The game speed itself is about the same as the ZX and its only a fraction more difficult.
MSX
Emulator : BlueMSX1
There was no loading screen and the introduction and menu screens are plain compared to other versions, but quite functional enough. I'm discounting the text onto the next line as an emulator or configuration issue given the huge variety of MSX variants.
The game plays quite slowly unfortunately and although the controls are quite responsive, the player movement is not quite right somehow. The graphics are quite pixelated too.
The sound effects are fine and good use is made of a white-noise generator for when you're hit by a baddie.