Europe is home to a diverse and vibrant online casino gaming market, with players enjoying a wide range of popular games. Here are some of the most popular online casino games in Europe, along with a detailed description of each:

1. Slots: Slot machines are incredibly popular across Europe, just as they are in many other parts of the world. These games are easy to play, visually appealing, and offer a wide variety of themes and features. Players spin the reels in hopes of matching symbols across paylines to win prizes. With the advancement of technology, online slots now often come with exciting bonus rounds, free spins, and progressive jackpots that can lead to significant wins.

2. Roulette: Roulette is a classic casino game that has been a staple in European land-based and online casinos for centuries. The game features a spinning wheel with numbered pockets and a small ball. Players can place bets on the numbers or various combinations, such as red/black, odd/even, or high/low. When the ball lands on a specific number or category, the corresponding bets win.

3. Blackjack: Also known as 21, blackjack is a popular card game in Europe and worldwide. The objective is to have a hand value closer to 21 than the dealer's hand without exceeding it. Players are dealt two cards and can choose to "hit" (get another card) or "stand" (keep the current hand). Blackjack is favored for its simple rules and the element of skill involved in making strategic decisions.

4. Poker: Poker has a massive following in Europe, with many players engaging in various poker variants. Texas Hold'em is perhaps the most popular poker game, where players are dealt two private cards and five community cards. They use skill, strategy, and psychology to outwit their opponents and win the pot. Other popular poker variants include Omaha, Seven-Card Stud, and more.

5. Baccarat: Baccarat is a card game that is particularly well-liked among high-rollers in European casinos. Players can bet on the "Player" hand, the "Banker" hand, or a "Tie" between the two. The hand with a total closest to nine wins. Baccarat is known for its simplicity and low house edge, making it attractive to many players.

6. Live Dealer Games: While not a specific game, live dealer games deserve mention due to their immense popularity in Europe. Live dealer games stream real-time footage of professional dealers hosting games like blackjack, roulette, baccarat, and poker. Players can interact with the dealers and other players, bringing the authentic casino experience to the comfort of their homes.

7. Craps: Craps may not be as widespread in Europe as it is in some other regions, but it still has a dedicated following. It is a dice game where players bet on the outcome of a roll or series of rolls. The game's social nature and various betting options make it an exciting choice for many players.

8. Video Poker: Video poker combines elements of slots and poker, offering a solo gaming experience. Players aim to make the best poker hand possible from the cards they are dealt. Different variants like Jacks or Better, Deuces Wild, and Joker Poker provide variety and entertainment.

These popular online casino games are widely available on licensed and reputable gambling platforms across Europe. Players can enjoy them for fun or real money, but it's essential to gamble responsibly and stay within one's means. Always choose reputable online casinos that prioritize player safety and offer fair gaming experiences.