It's completely free.
No sign ups.
Each player will need a decent computer with a webcam (no phones or iPads just yet.) A fairly fast web connection will help a lot.
Not really. The games have on-screen instructions, but it's expected that at least one person own the actual game and know how to play it.
Yup. The video and audio is shared player-to-player using a technology called WebRTC, which means it's encrypted and private.
