Many simulation games only emulate objects in small-scale. However, from players’ perspective, a full simulation would be better if they want to immerse the game totally. For example, in NBA Game series, game developers only consider how avatars play basketball in a game. We know in a real NBA game there are more factors such as audience’s boo cloud affect players' performance.
SimCity 4 is a simulation game that game designer do a great consideration in the simulation. The main purpose of players is to build their city by themselves. Players can focus on building a single city (small-scale simulation), or they can build many cities and make them interact together (full-scale simulation). For example, players can create a green city which must buy water resource or electric power from another city. These interactions between cities make the game more realistic, and players can have more chance to think how to player the game.