Heimdall appears in the Marvel: Ultimate Alliance.
Heimdall is the brother of the warrior Sif. He is the all-seeing and all-hearing guardian sentry of Asgard who stands on the rainbow bridge Bifröst to watch for any attacks to Asgard. He partly won the role through using his eyesight to see an army of giants several days' march from Asgard, allowing them to be defeated before they reached Asgard, and making their king a prisoner. For ages, he stood as the guardian of Asgard, defending the city's gates from any intruders, and was one of the most trusted servants of Odin.