In the realm of gaming, there's a treasure trove of free online games that offer fantastic experiences. Among the best are multiplayer games like 'Fortnite' and 'Apex Legends', which offer thrilling battle royale experiences. For those who love strategy, games like 'Hearthstone' and 'League of Legends' are top picks. 'Warframe' is another great choice for those into sci-fi action. So, whether you're an action junkie, a strategy guru, or a casual gamer, there's a myriad of free online games waiting for you.

In my opinion, The Elder Scrolls Online (ESO) is still worth playing in 2023. The game continues to offer a vast world rich in lore, immersive questlines, and a robust player community. It's also constantly updated with new expansions and patches which keep the gameplay fresh and engaging. Plus, the developers have maintained a fair monetization policy, making the game accessible to both free and paying players. In summary, ESO remains a standout in the MMORPG genre, worth your time and effort.

In the world of gaming, discrete mathematics plays a pivotal role. It's integral to the creation of algorithms which help in developing game mechanics, from character movements to the strategy behind AI opponents. Discrete math is also used to optimize resources and to manage the complexities found in many games, such as interconnected worlds or multiple player options. Additionally, game theory, a branch of discrete mathematics, helps in creating balanced and fair gameplay. So, next time when you play your favorite game, remember, it's not just fun, it's also a fascinating application of discrete mathematics.