Chapter 2. Anomalous Materials [Black Mesa]
The main hall of the scientific complex. We go into the corridor. There are three colored stripes on the corridor wall: red - Research, blue - Development, green - Personnel. (If you follow the red line, then ahead in a dead end you can see a man in a suit and with a suitcase in his hand (G-man), he will be talking to the professor behind the glass on the left). Follow the green line on the wall.
We enter the locker room, go to the dead end on the left, press the green button on the panel, take the suit. After that, you can look in the personal locker with the name Gordon, there will be a battery for the suit, giving +15 armor.
We leave the locker room, return to the fork in the corridors. Now we move forward along the blue stripe on the wall. We reach the elevator, go down.
2.2. Lower floors
We go further forward until we reach Professor Kleiner. In the next room, we'll be met by another scientist, Eli Vance. During our conversation, a minor equipment malfunction occurs; Gordon's colleagues remain behind to fix it. We enter the elevator alone and descend.
We proceed to the end, finding ourselves in a large room designed for scientific experiments, with a strange installation in the center. Here, at the scientists' command, we climb the ladder and press the green button on the panel. A rotor on the ceiling will begin to spin, and a laser beam will appear. We descend, wait for the protective grate to lower, and then move the cart with the orange crystal directly under the laser beam. This opens a portal to parallel worlds! Chapter Three .
Source: gamesisart.ru.