Game testing is a subset of game development focused on quality control of video games. Game testers are paid to play games and discover software defects or "bugs" like glitches, logic errors, and level bugs. Bugs are categorized from critical bugs that crash games to smaller issues. While the perception is that game testing involves leisurely play, it actually requires skills like attention to detail, critical thinking, teamwork, and technical writing to methodically test games and communicate any issues found. The life of a game tester involves tedious tasks, harsh working conditions, and poor job security as testing is serious work to ensure quality.