Feeling psychic today? Be sure to go check out The ESP Game.
A lot of fun (but more than a little addictive) — each player is teamed with another random player, and shown a series of random images. You have to guess a term describing each image that is the same as your “partner” used (the most obvious choices are usually banned).
Each game only takes about three minutes, so you get a chance to play with a lot of other players.
It’s interesting; after you’ve played awhile, you can really begin to feel a “click” when you and another player are on the “same wavelength” and you start hitting a number of successes quickly. Other times, you just can’t seem to get into sync with the other player at all.