Taking into account that most of the amiga games are superior to dos releases (see Cannon Fodder), does anyone know if the same goes with Superfrog?

So do you agree it is not exactly the same (last misson being much more difficult to accomplish)?

UAE and it's various ports (WinUAE for example) is a terrific open-source Amiga emulator. However it relies on images of the Amiga Kickstart chips to work. These are not open-source. They can be bought at a very reasonable price from the current license-holder http://www.amigaforever.com/.

I think that this is a very progressive approach to allowing legal emulation - I can't see Sony, Sega or Nintendo allowing people to buy legal images of their old chipsets any time soon!

However the likely cost of licencing a copy of a kickstart ROM for inclusion with each GOG download would probably be prohibitive. Given that the ROM could then be used with other games, it would have to be priced accordingly, so I suspect that it could add $10 or more to the price of each game.

An alternative might be to have some cross-promotion between GOG and Cloanto (the owners of Amiga Forever). GOG could provide legal downloads of Amiga games to be run on a separately purchased (possibly GOG-branded) Amiga emulator, which would include the Kickstart ROMs licensed from Cloanto.

If done right, you could have an application which contains the ROMs and the emulator, and allows in-application purchase of games from GOG.

Everybody would win - Games companies get some revenue from old games, Cloanto get to sell more Amiga ROMs and we all get to play some great games. None of this would go against the central GOG philosophy of avoiding DRM as you would be able to use the downloaded games and the Kickstart ROMs on any platform and with any emulator you wish.

I bought Superfrog the moment i saw it and I'm afraid that it isn't as good as Amiga release. Amiga release had HUD, different walking/running physics, ability to "shoot and run" (in this release you must wait for it to come back), different power up effects (3xspeed still only counts as one -Gimli). And the moment you press a directional button, Superfrog immediately has velocity and this is awful. You can't pinpoint your landing position.

tl;dr : Buy this game to help Team17 & GOG, play Amiga version to get the full experience.

sagolasin :)

This is a great idea and it makes even more sense for earlier games that were NIGHT AND DAY better than the DOS versions because of the superior Amiga graphics in the 80's/early 90's. Just spend a few minutes on Moby games looking at the Amiga and DOS screenshots from late 80's games, and it will be clear to you just how much better the Amiga (and the Atari ST) was as compared to DOS games. Most DOS users in those days had CGA or EGA graphics at best. It wasn't until a bit later that 256 color VGA became the norm and the playing field was leveled.

I quite like the PC version and I see no problem with GOG selling it as their download.

Uhm, I can hear everyone sharpening knives so I'll explain. When I first played Superfrog, I had no idea what the Amiga was. If you'd asked me I would have guessed that it was either a game manufacturer or a make of PC. I bought one of the very last copies of the PC version from its first (and only) pressing. And I played it with a joystick, which made it incredibly difficult.

But the fact that it's a lot more difficult makes it a bit more fun. In some ways. Bear in mind that I played all the way through the game before knowing there was any other version at all. And I got through... well... most of it.

Consider if you will this quote from Marcus Dyson, project manager for the game:
People forget that at the time, the PC was not cut out for those kinds of games - much of the differences were due to technical and time limitations rather than creative reasons.

And I'm not the only person who likes the DOS version, as well. One of the polls I ran shows that others agree with me.

I have no issues with Superfrog per se, that's why I said "...it makes even more sense..." for the earlier Amiga/ Atari ST games that actually are very, very different on the PC (and very, very inferior)
Superfrog is obviously late enough that the graphics are prolly the same, maybe a touch better on the PC.
I suppose there is a large number of old Amiga buffs that would prefer that version, and I think the solution is to offer both.
It is possible that GOG could reach an understanding with the company who holds the IP for Amiga emulation and make that a reality.
Everytime there is another game that a large number of people seem to want an Amiga version of, we are a little closer to that happening. (I hope)
That's what I meant.

I guess you could use the opensource kickrom (AROS M68K) with FS-UAE (Windows/Linux/OSX ports) for Amiga games.