Microsoft does not have an official Minesweeper application for iOS, never has, and probably never will, so clones are more acceptable in that case.
Scrabble and Tetris are actually trademarked names and have official applications as far as I know. They can sue any competitor for trademark infringement. There are competitors like "Block Puzzle," but they may predate the official Tetris for presence, but I'm not certain on that.
> "What’s even less surprising is how (little) Apple apply their Guidelines when it comes to their own apps" (from post)
Actually, I think any resemblance is forced (particularly with the Translate app) and that the design decisions are more logically-based than copying. How else would you make a Translate app by Apple look?