RE2 Drug Testing Lab Code How To Solve The Puzzle
Navigating the underground NEST facility in the Resident Evil 2 remake presents players with several intricate survival challenges. Among these obstacles, the Drug Testing Lab sequence stands out as a crucial puzzle required to synthesize the herbicide needed to destroy Plant 43. Understanding the exact mechanics of this puzzle ensures you save valuable time and avoid unnecessary backtracking through dangerous corridors.
Locating the Keypad Codes in NEST
Before you can interact with the herbicide synthesis machine in the Drug Testing Lab, you must unlock access via the Greenhouse Control Room terminal. The symbol combinations required to unlock the ladder hatch and the lab door are hidden across environmental clues within the facility. In a standard playthrough, inspect the bottom of the DNA Trophy found in the basement area to uncover the exact code sequence.
For players attempting a 2nd Run playthrough, the trophy location shifts to the desk beside the synthesis terminal. Inputting these specific symbol combinations into the control room console immediately grants access to the necessary machinery. Memorizing or retrieving these codes early streamlines your progress through the East Wing significantly.
Understanding the Fluid Transfer Mechanics
Once you insert the empty Dispersal Cartridge into the Drug Testing Lab station, you are presented with three test tubes of varying capacities. The core objective is to transfer liquid between the small, medium, and large cylinders until the solution reaches the marked red ring. You control this process using three buttons that rotate tube positions and pour liquids from the center tube into the left tube.
Because each cylinder holds a different maximum volume, transferring fluids requires strategic planning to avoid overfilling. If you make a mistake, you can reset or adjust your steps manually based on the remaining capacity in each vessel. Master these simple fluid transfer principles to complete the chemical combination quickly without unnecessary trial and error.
Step-by-Step Solution Sequences
For players starting fresh from the default starting positions, specific button sequences allow instant completion. In a standard First Run playthrough, pressing the colored buttons in the order of Red, Green, Blue, Red, Green, Blue, Red, and Green will solve the puzzle immediately. This quick sequence aligns the solution to the required red indicator line perfectly.
If you are navigating a 2nd Run scenario, the initial fluid levels start differently, requiring an updated sequence. Entering Blue, Red, Green, Blue, Red, Green, Blue, Red, and Green will resolve the puzzle from the default state. Following these exact inputs yields the filled Dispersal Cartridge instantly.
Next Steps After Solution Synthesis
Obtaining the liquid solution inside the Dispersal Cartridge is only the first step in neutralizing the threat in NEST. You must transport the filled cartridge down to the Low Temperature Testing Lab to chill the compound properly. Once chilled, return to the Greenhouse Control Room to deploy the herbicide through the sprinkler system.
Be prepared for immediate combat threats after leaving the laboratory, as dangerous enemies frequently patrol these corridors. Maintaining awareness of your surroundings allows you to safely deliver the finished compound and secure the Senior Staff Upgrade Chip.