Art director JJB said:

“Yes they are. We did design them, and drafted quite a few versions of what his legs could look like. Some of the things we came up with were quite spiffy! However, because we knew the legs would not actually get shown in the game, we mostly came up with those ideas to inform ourselves of the possibilities (either aesthetic or technological) more than to create the actual final design of his legs. Now, as far as his feet are concerned, some designs had them even more “twisted” than Namir’s. But those are not the designs I would have settled for. However, the human foot probably does have some flaws that would make no sense reproducing in an all new augmented and more efficient foot; and I definitely took these variables into account when designing Adam’s. So, in conclusion: no not as weird as Namir’s, but yes, different than a regular human biological foot.”