Prior to 1979, there were no third-party developers, with console manufacturers like Atari publishing all the games for their respective platforms. This changed with the formation of Activision in 1979. Activision was founded by four Atari programmers who left the company because they felt that Atari's developers should receive the same recognition and accolades (specifically in the form of sales-based royalties and public-facing credits) as the actors, directors, and musicians working for other subsidiaries of Warner Communications (Atari's parent company at the time). Already being quite familiar with the Atari VCS, the four programmers developed their own games and cartridge manufacturing processes. Atari quickly sued to block sales of Activision's products, but failed to secure a restraining order, and ultimately settled the case in 1982. While the settlement stipulated that Activision must pay royalties to Atari, this case ultimately legitimized the viability of third-party game developers. Activision's games were as popular as Atari's, with "Pitfall!" (released in 1982) selling over 4 million units.