Iata mai jos toate sugestiile pentru Portal 2: Achievements (Steam) Air Show - Perform 2 aerial gestures before touching the ground in co-op. Asking for Trouble - Taunt GLaDOS in front of a camera in each of the five co-op courses. Bridge Building - Complete all test chambers in the Hard-Light Surfaces co-op course. Bridge Over Troubling Water - Complete the first Hard Light Bridge test. Good listener - Take GLaDOS' escape advice. Can't Touch This - Dance in front of a turret blocked by