Y-17 Trauma overriding harnesses are much better example of absurdity IMO. Fully mechanized autonomic suits, moving on its own with a dead body trapped inside? Excellent stuff and very original, if you ask me. Much more funny than "oh noes, I suffer with amnesia caused by head injury!" wanna-be serious yet boring cliche, used in Witcher and dozens of other games before.
I think it was also explained how those suits work... better check on the Vault.
I'm not sure why you're comparing it with the whole amnesia cliche tho. And as far as it goes, it is a cliche, for sure, but nonetheless a useful plot element for establishing in medias res. If it's done right.
As for
The Witcher, that game at least acknowledges that the character has actual amnesia and has memory slowly returning (and the character acknowledges that himself, numerous times), and that amnesia is caused by something far greater than "simple" head injury, though I guess you need to read the books to know that. It doesn't simply give a blank state of the character like many other games, all the while pretending that "it's not amnesia" and using it as an excuse for complete freedom in character creation. Geralt is, in a way, an already formed character, the likes of which can be traced through his dialogue and actions, as well as past references. What is left to the player is to, basically, fill in the blanks, though the game does sometimes make a faint, but nonetheless, existent pointer to a right direction (right as in "this is what old Geralt would've done").
Characters from his past and dialogues with them matter, but it's peculiar that Geralt never asked more about his history some of his (ex-)companions like Dandelion, who is asserted to be his best friend. I'm talking
The Witcher only, the first game, and not the sequel. I still haven't tried the second game, so no spoilers, please.
That book sounds interesting. Some basic outlines give me
The Re-Animator vibe. I suppose because of the whole head-business going on...