Cryptic's Champions Online will be free to all next weekend as part of the MMO's Blood Moon Hallowe'en event.
The promo will run from 10.00am October 30 until 10.00am November 2 (PST).
All our subscribers will be able to play the Blood Moon content starting October 27.
More info here. If you're not already a sub you can sign up for an account there as well.