What is "pssst"

interj. (alternative form of psst English)

Pssst is an action video game developed and published by Ultimate Play the Game that was released for the ZX Spectrum in June 1983. In the game, Robbie the Robot has to protect his plant (a Thyrgodian Megga Chrisanthodil) as it is attacked by various insects, each of which needs a different repellent to neutralise it. Pssst was the second game to be released by Ultimate, after Jetpac.

The game was written by Chris Stamper and graphics were designed by his brother, Tim Stamper. Pssst was one of the very few Spectrum games also available in ROM format for use with the Interface 2, allowing "instantaneous" loading of the game (the normal method of cassette loading could take several minutes). The game received positive reviews from two publications upon release, with critics mainly praising its presentation and gameplay. It was placed 40th on the "Best Selling Software" list by Personal Computer Games in December 1983.