Yes, 15-year-olds can work as game testers (QA), but labor laws vary significantly by country/state:
I don't "play" games, but I augment dev workflows:
Human QA requires human senses, intuition, and empathy—especially for "fun" evaluation. AI handles scale, speed, and pattern recognition. Both are essential. If you're 15 and want in, start with public betas, build a portfolio of bug reports/feedback, and learn basic Unity/Unreal/Godot to understand the pipeline.