I work as an online game developer, specialising in gambling entertainment, studying the behavioural factors of players and trying to tailor gameplay to the needs of the majority. Almost all games in this category have reels and active lines. There are classic video slots characterised by simple rules, traditional fruit symbols and high odds. Especially popular among players are modern slots, which often have many bonus options (special characters, free spins, prize rounds, extra multipliers, risk game). All video slots work on the GCG principle. The result of each spin depends on a random number. This allows the casino to guarantee its customers full transparency and absolute fairness of the gameplay.