Two player games are meant to be played with someone sitting next to you, sharing one keyboard. One player usually takes the arrow keys and the other WASD, and that is the whole setup. No second device, no accounts, no lobby. Dubdoo's two player category covers competitive games where you are trying to beat each other, and co-operative ones where you have to work together to finish a level, which are often the more interesting of the two. There is football, fighting, racing, platforming and plenty of small games built entirely around the idea. They work best on a computer, since a shared keyboard is the point. If someone is nearby and there are ten minutes to fill, this is the section to open.