One of my favorite: HYDEFOS
Great game. Must have finished it at least 15 times. But I've never come across any platforms in it. 
Where does it have colour bleed in Theseus?
I think they mean that the lava will sometimes 'shake' into the walls for a small second.
One of my favorite: HYDEFOS
Great game. Must have finished it at least 15 times. But I've never come across any platforms in it.
Ops!... I had left out the word "platform" ... 
However, in screen 4 it is not expensive at all, nor really difficult.
Quesion is, why aren't there more games doing it? Possibly because of the jerky border? I get that, but there are ways around it. Strangely only one game in the list does it though. @journey mentions Hydefos --which isn't a platformer, but still does this, setadjust and is using sprites for edges. Ok, so it limits your available sprites, but there are ways around that too. On that note - one game that also is standing out a bit from the rest is
- Invasion of the zombie monsters
I should have had that in my "honorable mention" earlier. This game seems to have been made without sprites. Still, the main char is looking really good, the animation is nice and the action is fast. Cleverly made with layers of scrolling backgrounds, as well as the main char can walk behind things.
This got rejected before but Pitfall 2 definitely scrolls (smooth on msx)
Sorry, my bad! Should absolutely be on the list!
Where does it have colour bleed in Theseus?
No way around that on the MSX1. Scrolling patterns is one thing, but the color-limitation of two colors per 8 pixels does this:
Spectrum games have this all the time, but MSXers are not so used to it, I guess? Probably not a big deal, but it's a matter of opinion :-)
One of my favorite: HYDEFOS
Great game. Must have finished it at least 15 times. But I've never come across any platforms in it.
Ops!... I had left out the word "platform" ...
I know, sometimes I do things like that too, hehehe. 
Did you ever see the 'true' ending of Hydefos? I did not know about that until the patch was released:
https://www.msx.org/news/software/en/amazing-hydefos-transla...
(sorry for off-topic, will crawl back under my rock now)
@journey mentions Hydefos --which isn't a platformer, but still does this, setadjust and is using sprites for edges. Ok, so it limits your available sprites, but there are ways around that too.
As you already mentioned - Psycho World, of the same developer, does the same and is actually a scrolling platformer.
On that note - one game that also is standing out a bit from the rest is
- Invasion of the zombie monsters
I should have had that in my "honorable mention" earlier. This game seems to have been made without sprites. Still, the main char is looking really good, the animation is nice and the action is fast. Cleverly made with layers of scrolling backgrounds, as well as the main char can walk behind things.
If I remember/know correctly, I think disabling the HW sprites alltogether speeds up everything. Even in BASIC.
Where does it have colour bleed in Theseus?
No way around that on the MSX1. Scrolling patterns is one thing, but the color-limitation of two colors per 8 pixels does this:
Spectrum games have this all the time, but MSXers are not so used to it, I guess? Probably not a big deal, but it's a matter of opinion :-)
Yes, that's exactly what I meant! :)
And I agree, it's not really a big deal. It doesn't hurt the general flow and look of the game in any way.