Includes:
* Time-limited demos (Time trials) - the kind that forcibly quits after set time, such as 10-30 minutes - still apply as long as they allow the player to repeat this as many times as possible (no matter how futile it is). Some may be limited to 30-60 minutes but do not allow repetition.

Limitations:
* Non-playable demos do not count as they're effectively the same as ads or trailers.
* Demos that are available only for a short time do not count either (such as the Left 4 Dead demo which was available only for a week before release after which it was permanently disabled and made unavailable).
* Multiplayer demos for primarily single-player games do NOT count.
* Non-free demos do NOT count either.