A prototype of "Asteroids" was well received by several Atari staff and engineers, who "wander between labs, passing comment and stopping to play as they went". Logg was often asked when he would be leaving by employees eager to play the prototype, so he created a second prototype for staff to play. Atari tested the game in arcades in Sacramento, California, and also observed players during focus group sessions at Atari. Players used to "Spacewar!" struggled to maintain grip on the thrust button and requested a joystick; players accustomed to "Space Invaders" noted they get no break in the game. Logg and other engineers observed proceedings and documented comments in four pages.