Rayman 2: The Great Escape/YMMV

Deader Than Disco: The Nintendo 3DS version wasn't very well received in relation to any of the other versions, even going so far to lose to the DS version in many cases. This mostly was because the port went totally unchanged, and quite clearly shows that 3D platformers have come a long way since 1999.
Porting Disaster: The Nintendo DS version (released as Rayman DS) was ported with the original PC keyboard controls of Rayman 2. The DS doesn't have anything even vaguely resembling a keyboard. Some people went out and bought a joypad to eliminate the control problem, which probably doubled the size of the set-up. This was turned Up to Eleven in the iOS port; the controls are very unbearable, and it's hard to react to close call situations. This isn't to mention you cannot lock on to enemies in a game that relies heavily on combat. The musical score was also screwed up, as they pause a second before looping, and music that's not even supposed to loop loops anyway! It also has a severe problem where some tracks were displaced, such as the "rescue babies from the mines" (which now plays the menu theme rather than the cheery freedom-ish theme) and one track that plays way too often, particularly when you dance with a teensy and when there's supposed to be dead silence.