Navigating through the NEST facility in Resident Evil 2 Remake presents players with some of the game's most intricate puzzles. The Greenhouse Control Room and the Drug Testing Lab form a major hurdle in the East Area, requiring specific terminal codes and liquid measurement solutions to synthesize the herbicide needed to reach the Level 3 Upgrade. Understanding how these codes differ between playthroughs ensures a smooth escape from Umbrella's underground complex.
Greenhouse Control Room Terminal Codes
The control panel in the Greenhouse Control Room manages access to both the basement ladder and the drug synthesis machine. In a standard New Game, inputting 3-1-2-3 unlocks the ladder hatch, while 2-10-6-7 grants access to the Drug Testing Lab terminal. For players working through a 2nd Run playthrough, these combinations change to 5-8-3-1 for the hatch and 2-10-4-8 for the synthesis machine.
Drug Testing Lab Herbicide Synthesis
Once the terminal is active, players must insert the Dispersal Cartridge to combine chemicals to the marked red line. In the initial playthrough, pressing the colored buttons in the sequence Red, Green, Blue, Red, Green, Blue, Red, Green will quickly match the exact measurement required. Gamers looking for helpful strategy guides and daily gaming news often emphasize mastering this puzzle to conserve resources for upcoming boss encounters.
2nd Run Solution and Liquid Management
The 2nd Run scenario alters the starting volume of the liquid tubes, demanding a different button combination. Entering Blue, Red, Green, Blue, Red, Green, Blue, Red, Green solves the container balance instantly without manual recalculations. If you accidentally move the tubes beforehand, you can still balance the volumes by systematically filling the medium container from the largest tube and adjusting incrementally until the proper fill level is reached.
Cooling the Herbicide and Final Steps
Synthesizing the liquid is only part of the process, as the newly filled cartridge must be chilled before deployment. Head down through the unlocked hatch into the basement lounge and transport the cartridge to the Low-Temp Lab to freeze the solution. After cooling the chemical, return to the Greenhouse Control Room to dispense the herbicide, destroy the mutated plant growth, and retrieve the key card upgrade.
