More complicated simulations started appearing in the early 1980s, such as the Commodore 64 game Little Computer People, where the player was responsible for the care and feeding of a virtual person. Variations appeared for years on various platforms, even surviving into the 1990s as their requirements were so low that ports could even run on programmable calculators. Probably the first game in this tradition is Lemonade Stand, written by Bob Jamison sometime between 19: The player, based on the daily weather report, decided what supplies to buy and how much to charge customers at their virtual lemonade stand. The player generally has no direct control over individual agents inside the game world - thus their role, depending on the scope of the game, tends to be labelled something ranging from 'business owner' or 'mayor' to 'president' or even 'god'. Traditionally, a simulation game places the player in a managerial role over some set of resources, with which they are charged to build or do something - the game might set some criteria for a 'win' state, but this is far from compulsory the player can generally build/do whatever they want and measure their own success by whatever metrics seem best to them (so long as he doesn't trigger a 'lose' state through long-term mismanagement, whether accidental or deliberate).

Game simulator sim