F6 One-Handed RGB Gaming Keyboard

The left-hand block of a keyboard and nothing else: the keys a game actually uses, on a board small enough to angle however the hand wants it. The rest of the desk goes to the mouse, which is the whole argument for one.

The keys light in colour, and the compact shape makes it a second board rather than a replacement — plugged in next to a full keyboard for playing, unplugged and put away for working.