Antonyms for the term "fun games" would be dull games or boring games. These types of games lack excitement, creativity, and engagement. They do not challenge the players or ignite their curiosity. Boring games have a monotonous and repetitive nature that fails to hold interest and attention. They lack the fun and enjoyment that players seek in a game. The opposite of fun games are uneventful games that do not possess any thrill, adventure, or entertainment value. Such games fail to inspire and motivate the players to explore further, and their engagement with them is typically short-lived.