Name of Google Chrome dinosaur cactus game

Solution 1:

It's sometimes called the downasaur. I don't know if it was originally his name, but some google folks seem to call it that way nowadays :D

See here: https://developers.google.com/web/progressive-web-apps/

Reliable - Load instantly and never show the downasaur, even in uncertain network conditions.

Solution 2:

It is simply called T-Rex or T-Rex Runner in the source code, and doesn't seem to have an official name. As it is an Easter Egg, it is likely it will never get one unless or until it is officially acknowledged. The patch with this change also doesn't seem to name it, it simply refers to a bug which is not available to view.