The anime will have a total of four episodes. The first episode will be available digitally on December 25 starting at 12 p.m. in Japan (December 24 at 10:00 p.m. EST). The first episode will be available via an EST (Electronic Sell Through) service that will allow purchasers to download the episode. The website notes that this is the first time a Gundam series will be available via this method. Those interested can purchase the first 18-minute episode along with a special bonus video titled "Ichinen Sensō ni Idonda Mono-tachi ~Documentary of Thunderbolt #1" (Those Who Challenged the One-Year War ~Documentary of Thunderbolt~ #1) for 500 yen (about US$4). The documentary is listed as being approximately 10 minutes long.
The episode on its own will also be available via a rental video-on-demand service for 250 yen (US$2). The website has not yet revealed the territories the anime will be available in, or if Sunrise will release the anime with English subtitles or an English audio track. Sunrise will also reveal the services that will sell/rent the anime at a later date.
Those who have a subscription to the Gundam Fan Club app will be able to purchase the episode starting on December 11 at 12:00 p.m. in Japan.