AVGM

”Comes with a free life-changing revelation” AVGM is an experimental clicker game released in 2009. It’s unlocked by beating Coil.

Gameplay
You click a lightswitch. After clicking it twice, something appears. 4 times, something appears, 8 times, something appears. Each time the clicks needed to spawn something doubles. Once you reach a lot of clicks, you unlock the next stage and can continue.

Modes include:

Normal Mode - 10212 clicks

Nightmare Mode - 22450 clicks

Hell Mode - 49148 clicks

Inferno Mode - 107175 clicks

It may be tempting do this with an autoclicker, but it's recommended to not use one as it completely ruins the life-changing experience.