- When using Gjallarhorn, the current background changes into the Bifrost Bridge background.
- Heimdall was confirmed to be the Special Operations 14 Hero at New York Comic-Con on October 12, 2013.
- Heimdall has two themed weapon, and .
- Heimdall is the first hero who can change the Combat Background.
- Heimdall is Sif's brother.
- Hofund is the name of Heimdall's sword.
- Gjallarhorn, old Norse for "the loud sounding horn", was the horn that Heimdall would blow at the onset of Ragnarök. When he blew it, the horn could be heard in all the nine realms.