Surely this has got to be one of the worst, in the top 5 at least?
Super Street Fighter 2 Turbo
Played on my friends DX2 66, brilliant (for a PC), so bought it for my amiga, 30 quid for 2 sound effects and 10 frames of animation. Gametek are criminals. Just not on. Even the original street fighter 2 was better.
And of course
FEARS
Doom on the amiga? No gameplay to speak of, enemies homed in directly on you with abslutley zero AI (the most pathetic creatures i've witnessed in any game), the rockets didn't explode, and did anyone play deathmatch? The most appalling display I've ever seen, it took 99 shots of the shotgun to kill the other player. An abomination, imo.