Simulation games have long been a staple in the gaming industry, offering players a unique opportunity to experience a wide range of virtual realities. With '7 game' as our guiding keyword, we delve into seven standout titles that have left a significant mark on both the genre and the players alike.

1. **The Sims Series**: No discussion of simulation games would be complete without mentioning The Sims. This life simulation game has allowed players to create and control characters in a virtual world, making choices that mimic real-life decisions. The franchise's ability to adapt and expand with various expansions and mods has kept it relevant through the years.

2. **SimCity**: As a pioneer in the city-building sub-genre, SimCity challenged players to design and manage a metropolis from the ground up. Balancing budget, zoning, and public services, this game educates as much as it entertains, highlighting the complex decisions city planners face.

3. **Animal Crossing: New Horizons**: Offering a serene escape from everyday life, Animal Crossing invites players to cultivate their own island paradise. With real-time gameplay, seasonal events, and community interactions, it fosters a sense of belonging and creativity.

4. **Stardew Valley**: This indie darling revitalized the farming simulation genre with its combination of farming, role-playing, and questing. Its charming aesthetic and open-ended gameplay allow players to farm, mine, fish, and build relationships at their own pace.

5. **Flight Simulator 2020**: Microsoft’s Flight Simulator franchise has set a new standard for realism in gaming. With stunning visuals and accurate flight dynamics, it offers aviation enthusiasts a chance to fly across a meticulously detailed virtual globe.

6. **Planet Coaster**: For those who dream of designing their own theme park, Planet Coaster is the ultimate playground. The game provides extensive customization options and challenges players to manage both the creative and operational aspects of a theme park.

7. **Factorio**: This title puts players in charge of building and managing automated factories. Its complex logistical challenges and open-ended creativity test players' problem-solving skills, making it both a deeply engaging and intellectually rewarding experience.

Simulation games offer a diverse array of experiences, and these seven titles have paved the way in demonstrating the potential of what can be achieved in virtual worlds. They provide not just entertainment but also a window into seemingly limitless possibilities where players can explore ideas, creativity, and problem-solving in ways traditional games may not offer.