Engadget
Here's what you should look for when buying an Android phone for gaming

Android gaming phones should prioritize a powerful processor, such as Snapdragon 8 Elite or MediaTek Dimensity, and ample RAM—8 GB as a baseline, 12–16 GB ideal—to keep game assets in memory and avoid stutters. Effective thermal management, including vapor-chamber cooling or heat sinks, prevents throttling during extended play, while high refresh rates (120 Hz common, up to 165 Hz) and touch sampling rates around 240 Hz enhance motion smoothness and input responsiveness.