Upgrade Complete II
Upgrade Complete II is a Flash game made by Armor Games in 2011. The goal of this game is to upgrade everything in the game by controlling a spaceship and killing enemies, and gaining money by doing so.
However, when buying the Heart Rate upgrade, a flashing picture of a boy with a Photo Booth filter and a loud scream appears.
The game's sequel, Upgrade Complete 3 also has a secret jumpscare, but unlike the second, there is a warning.
NOTE: The following game contains a screamer!