User blog comment:Brett307/BTD5 Deluxe Edition/@comment-5186979-20120605100806/@comment-3153244-20120605121510

To answer your question, BTD5D will be released digitally and instantly with no packaging. Gives you a license key thingy.

Sources: BTD5 Deluxe page on this wiki; Official BTD5 Deluxe "game" on NK website