@God Ginrai - I was going to say that those are third-party titles, but it looks like I got ninja'd.
h34r:
@SirisC (and also at God Ginrai, I think - I'm having trouble keeping up, here! :lol: ) - Aside from the various carnival prizes (such as the light-show devices, and the rebranded PMP, and so on and so forth), I actually meant the rather recent official "Mega Drive" "clones", both with and without cartridge slots, that are sold at retail in at least the UK (EDIT: And on Play-Asia).
To give a brief run-down, though, for those not familiar with them: They aren't clones, and they aren't based on real Mega Drive hardware - they're based on a 32-bit ARM SoC of some sort, which is running emulation software which is not properly compatible with many very common games. For example, even the in-built games, which I presume were chosen to match the hardware's strengths, are not correctly emulated, and PAL-optimisations in some of them are ignored (the device has a PAL/NTSC switch, but some of the built-in titles which were originally adjusted to run at the correct speed on PAL Mega Drives do not run at the correct speed in either mode); As far as problems with common cartridges go, in Sonic The Hedgehog 2, the protagonists have large holes through their faces and bodies; In Rocket Knight Adventures, Sparkster is a big corrupted mess; In any game that has underwater graphical effects (or other similar tricks), the water colours cover the whole screen and will sometimes flicker in a fit-inducing manner between the normal and water palettes; And for my last example, no game has accurate audio, and what you hear is inexcusably bad - it is far below the state of Mega Drive audio emulation at the start of the last decade. There are plenty more issues, but these are the most obvious within about two minutes of using one of these devices.
I was given one, and got the opportunity to try out a few cartridges besides my own (I'm not a huge fan of most of the first-party stuff, so most of my collection is third-party things
), but it prompted me to instead seek out and buy a Multi-Mega.