I have recently seen that someone posted about lost games so I felt kind of encouraged for seek help for this.
There are 3 games that I played about 10 years ago that I can't remember well - they were 4 but fortunately I found one in an Action 52 Genesis cart, "Go Bonkers" (big deal for a puzzle).
The first was a NES game (for the graphics I'm almost -not entirely- sure that wasn't Genesis) that started with a white ninja in a snow field, just about to jump almost fullscreen, just after a black screen that said "AREA/STAGE 01", in classic white NES font. It was a side scroll game.
In gameplay ninja moved around between ice platforms and there was one that had a gray rack for climb. All of that was just at the beggining, which is the only stage I remember.
The second was a Genesis kind of RPG that featured an Cool Spot-like (but game is not Cool Spot!) character (I remember him being red) that moved in a old pirate ship (palette for one of the ship's floor was violet) in aerial view/top down view. Later in the game character could go at the top of the ship, that had a yellow palette. This is really the game I searched for long but that didn't found anywhere. Next is also for Genesis, but fortunately more identifiable
And the last was a medieval-greek hero killing dragons, riding dragons with an extremely large HUD and it was really, really hard to beat. Graphics where pretty detailed and I remember it as a Castlevania with dragons, but a lot less colorful (general palette for the first stage was similar to Golden Axe's).
Aaaand there's a fourth one but not as important as the listed above. It was a puzzle EA game (IIRC blue EA logo belongs to old EA) in which you had to set green pieces in a [Longcat.jpg], very long blue board, with others dark blue blocks interfering. The final level was absolutely crazy to beat (blocks were reduced to the minimum size possible and filled all the board!) and it definitively belongs to Genesis.
... and that's all, maybe some old geezer may recognize one of this games (just one would be okay, really...)