Blastacular pack is a downloadable content package for Halo 2 developed by Certain Affinity. It was released on April 17, 2007 for $4.00, and re-released as an updated package on May 7, 2007 (still for $4.00), as several glitches discovered in the included content had been fixed. Blastacular Pack was made permanently free on July 7, 2007 (Bungie Day). This download is required in order to play Halo 2 Matchmaking over Xbox Live.
Blastacular Pack added the following new content to Halo 2:
- Blastacular Pack takes up 142 MB on the Xbox's HDD.
- The Blastacular Pack content is not included in the Halo 2 Multiplayer Map Pack or the PC version of Halo 2, as it was released after the former was released.