"Asteroids" was immediately successful upon release. It displaced "Space Invaders" by popularity in the United States and became Atari's best selling arcade game of all time, with over 70,000 units sold. Atari earned an estimated $150 million in sales from the game, and arcade operators earned a further $500 million from coin drops. Atari had been in the process of manufacturing another vector game, "Lunar Lander", but demand for "Asteroids" was so high "that several hundred "Asteroids" games were shipped in "Lunar Lander" cabinets". "Asteroids" was so popular that some video arcade operators had to install large boxes to hold the number of coins spent by players. After replacing "Space Invaders" at the top of the US "RePlay" arcade charts in April 1980, it went on to become the highest-grossing arcade video game of 1980 in the United States. It shipped 70,000 arcade units worldwide in 1980, including over 60,000 sold in the United States that year, and grossed about worldwide ( adjusted for inflation) by 1980. The game remained at the top of the US "RePlay" charts through March 1981. However, the game did not perform as well overseas in Europe and Asia. It sold 30,000 arcade units overseas, for a total of 100,000 arcade units sold worldwide.