AC Black Flag: how to show all items with overlay

To answer your question: no. Not a "good" way. Borderless mode, or Fullscreen Windowed mode as you call it, will fun the game as "fullscreen", though as a borderless window application. said window is not re-sizable. An adequate solution would be to open a completely black picture to have underneath a regularly windowed game, and set the resolution on said game lower. You will have the border from the game, and you'll have to open a picture every time you wanna game though (plus, it's another thing to have to keep in front of your browser and such after browsing something). Personally, I have yet to play a game that allows resizing of the rendered area in the game window at all, much less re-sizable borderless windows.

Found a solution here. In summary:

1. Enable the console
   1. Go to My Documents\Bioware\Mass Effect\Config
   2. Open the BIOInput.ini file with a text editor
   3. Under the [Engine.Console], add the ConsoleKey=Tilde line
2. Unlock achievements
   1. Start the game
   2. Open the in-game console by hitting the ` key
   3. Type unlockachievement n where n is a number between 1 and 47. They will unlock the achievement with that number. The site I linked has a full mapping between the number and the achievement, but I just went through and enabled them all.