Elmo's Letter Adventure is a 1999 Sesame Street video game for the PlayStation and Nintendo 64 consoles, developed by Realtime Associates and published by NewKidCo, with Ubisoft Entertainment handling co-publication in Europe. It is the companion title to Elmo's Number Journey.
In the game, Elmo explores Sesame Street and places beyond in a quest to collect letters. Levels include "The Farm" (hosted by Big Bird), "Outer Space" (hosted by Grover), and "Underwater World" (hosted by Ernie). Count von Count appears as well, but does not host a level.
