Before GLaDOS is a series of tests taking place at the time of Cave Johnson, when he was still alive. The pre-recorded messages from the old vitrified installations have incorporated the brand new enrichment center for which you are the first test subject....

Before GLaDOS is a series of tests taking place at the time of Cave Johnson, when he was still alive. The pre-recorded messages from the old vitrified installations have incorporated the brand new enrichment center for which you are the first test subject....

Before GLaDOS is a series of tests taking place at the time of Cave Johnson, when he was still alive. The pre-recorded messages from the old vitrified installations have incorporated the brand new enrichment center for which you are the first test subject....

Before GLaDOS is a series of tests taking place at the time of Cave Johnson, when he was still alive. The pre-recorded messages from the old vitrified installations have incorporated the brand new enrichment center for which you are the first test subject....