I purchased through steam so I can also choose to take a refund 2 hours into release if it's still not worth it.
REFUNDS ON DOWNLOADABLE CONTENT
(STEAM STORE CONTENT USABLE WITHIN ANOTHER GAME OR SOFTWARE APPLICATION, "DLC")
DLC purchased from the Steam store is refundable within fourteen days of purchase, and if the underlying title has been played for less than two hours since the DLC was purchased, so long as the DLC has not been consumed, modified or transferred. Please note that in some cases, Steam will be unable to give refunds for some third party DLC (for example, if the DLC irreversibly levels up a game character). These exceptions will be clearly marked as nonrefundable on the Store page prior to purchase.
REFUNDS ON PRE-PURCHASED TITLES
When you pre-purchase a title on Steam (and have paid for the title in advance), you can request a refund at any time prior to release of that title. The standard 14-day/two-hour refund period also applies, starting on the game’s release date.
Right of withdrawal
As a Steam user domiciled in a European Union member country, you have the right to withdraw from any purchase on Steam without giving any reason.
For any
digital content purchased online, you have agreed upon checkout that the withdrawal period will expire 14 days after you purchase such digital content or when you start downloading the content for the first time, whichever is sooner. For
hardware, the withdrawal period will expire after 14 days from the day on which you acquire, or a third party other than the carrier and indicated by you acquires, physical possession of the goods.
To exercise the right of withdrawal, you must inform Valve Corporation of your decision to withdraw from the purchase by an unequivocal statement (e.g. by a letter sent to Valve Corporation, 10400 NE 4th St., Bellevue, WA 98004, United States). You may attach the model withdrawal form available below, but it is not mandatory.
The easiest way to exercise your right of withdrawal is by using the support form on our website at
http://help.steampowered.com. If you do so, we will communicate to you an acknowledgement of receipt of such a withdrawal on a durable medium (e.g. by e-mail) without delay.
To meet the withdrawal deadline, it is sufficient for you to send your communication concerning your exercise of the right of withdrawal before the withdrawal period has expired.
also Briton if thats where u live is no longer subject to euro law if i recall. ALSO this isn't considered a pre purchased title it falls under DLC