Stealth Master 3D is an action-adventure game in which the player takes on the role of an agent and completes a series of missions. The game has many different levels and missions, such as rescuing hostages, stealing confidential documents, assassinating enemies, and so on. Players need to use a variety of tools and weapons, such as pistols, daggers, smoke bombs, etc., to complete the mission. In the game, players need to stay hidden to avoid being discovered by the enemy but also pay attention to the enemy's patrol routes and alert status. The game's graphics and sound effects are very realistic, and the gameplay is very exciting and popular among players.