Commander Keen - 10/10
Commander Keen was derivative crap compared to the ground-breaking platform games available on the Amiga at the time. Turrican, Gods, the Psygnosis games, etc. True, some of that was the hardware's fault--PCs were still 16-color, low res wordprocessors and calculators back then, compared to 4096 color multimedia Amigas--but the design of the game itself wasn't anything special. It was a demonstration of Carmack's programming abilities and not much of a game. I suppose you could also consider the budget they were working with, but still, it was crap compared to those Amiga games.