In-game purchases, also known as microtransactions, have become the dominant revenue model for many video games, allowing players to purchase virtual items, cosmetics, or other enhancements within the game.

The video game industry has experienced tremendous growth due to a combination of factors, including advancements in technology, increased internet connectivity, and the growing popularity of esports, which have expanded the audience and revenue streams for video games.

Microtransactions refer to the sale of virtual items or enhancements within a video game, typically for a small amount of real money. This practice has become prevalent in many free-to-play and premium games.

Game Theory, Behavioral Economics, and Prospect Theory are all economic concepts that have been applied to analyze consumer behavior in video games. These theories help explain how players make decisions, interact with each other, and respond to in-game incentives and rewards.

Real-World Trading (RWT) encompasses the buying and selling of virtual goods or accounts in video games for real-world currency or other items of value. This includes virtual item trading, account trading, and any other form of exchange that involves real-world transactions.

The Scarcity Principle states that consumers place a higher value on items that are perceived as scarce or limited in availability. This principle is often used in video games to encourage players to make purchases by creating a sense of urgency or exclusivity.

Discounting refers to the practice of selling a video game at a lower price after its initial release. This is often done to attract new players or to boost sales during periods of low demand.

Price Discrimination is an economic concept that refers to the practice of charging different prices for the same product or service to different consumers or groups of consumers. This concept is often used to analyze the pricing of video games, as publishers may offer different prices for different platforms, regions, or editions of the game.

DLC (Downloadable Content), Season Pass, and Special Edition are all terms used to describe the practice of selling a video game in multiple editions with different levels of content or features. These editions may include additional missions, characters, cosmetics, or other enhancements.

Externalities, Public Goods, and Market Failures are all economic concepts that have been used to analyze the impact of video games on society. These concepts help economists understand how video games can generate both positive and negative effects, such as educational benefits, social interactions, or potential addictive behaviors.

Retail Sales, Physical Release, and Packaged Goods are all terms used to describe the practice of selling a video game in a physical format, such as a disc or cartridge. This is in contrast to digital distribution, where games are purchased and downloaded online.

Substitution Effect, Complementary Effect, and Network Effects are all economic concepts that have been used to analyze the relationship between video games and other forms of entertainment. These concepts help economists understand how video games can compete with or complement other entertainment options, and how the popularity of video games can be influenced by network effects.

Digital Distribution refers to the practice of selling a video game in a digital format, such as a download or streaming service. This is in contrast to physical sales, where games are sold in a physical format, such as a disc or cartridge.

Gross Domestic Product (GDP), Employment, and Innovation are all economic concepts that have been used to analyze the impact of video games on the economy. These concepts help economists understand how video games can contribute to economic growth, create jobs, and drive innovation in various industries.

Virtual Currency refers to the practice of allowing players to purchase virtual currency within a video game, which can then be used to purchase in-game items or services. This is often used in free-to-play games as a way to generate revenue.