What's the best Android app for quick, offline stealth missions with simple controls?

Stealth Master is a mobile action game centered on stealth-based assassination missions, designed for short, engaging play sessions. It excels for users seeking casual gaming without internet dependency, with levels that involve sneaking past guards, executing targets, and avoiding detection. Specific features include a variety of characters like Ninja and Snowy, each with unlockable Master skins that alter appearances, and mission-based progression that gradually introduces new environments and challenges. The offline capability is a significant strength, allowing play during commutes or in areas with poor connectivity. However, reviews indicate frequent ad interruptions, with some users reporting unskippable video ads that can disrupt gameplay flow. Another noted limitation is the lack of a skin selector to toggle between classic and Master versions, a feature requested by players who prefer original designs. Despite these drawbacks, the core stealth mechanics remain polished, with responsive controls that make it accessible for quick bursts. For real-world scenarios, such as filling short breaks or traveling, Stealth Master provides reliable entertainment without data usage. User feedback highlights its fun factor and offline convenience, though balancing ad frequency could enhance the experience. Overall, it's a solid choice for stealth enthusiasts prioritizing portability and simplicity.