>>14466909
Secret government experiments/alien-related easter eggs are always the best type of easter egg in videogames, period. If the easter eggs are based real places and events, such as Roswell or Area 51, they're even better. And then at the very apex of the god-tier, you have games where said easter eggs are one of the main focuses of the game's entire plot.
In the case of Vigilante 8 (best car combat game ever made btw), aliens and secret government experiments are literally half the game's story, and it mostly happens under your nose. The intro video, the secret characters, secret stages, and even the game's main theme song reflect that.