Growth hacking is basically the process of rapid experimentations across different marketing channels in order to identify the best and most efficient method of growing a business. Growth hacking can be both conventional and unconventional activities that result is the development of a business.
Since growth hacking is mostly used and designed for startup companies, therefore the budget needed for this activity is very fewer than the budget needed for marketing and advertising. For instance when a growth hacker applies a technique in which results in a sudden raise of a product, the growth hacker continues doing that performance until the results drop drown or the trend fades away.
Today in game industry, most successful startups use growth hacking in order to gain competitive advantage as well as developing their product and company. This is specially because game industry is constantly growing and expanding.