DeCode is a popular 1.9 demon level by Rek3dge. It is generally considered an easy demon. There is a sequel for the level, called DeCodeX.
DeCode was created shortly after 1.9 was released. At its time, it was considered a hard-very hard demon because wave was much newer at the time, but is now considered easy, and sometimes very easy because players have gotten more used to wave and its difficulty has been lost to much harder demons such as Cataclysm. Still, it is a moderate challenge to newer players.
The level starts off with a cube that has pretty easy timing and a few pads, gravity portals and jump rings. The cube then switches to a double speed rocket that requires decent straight fly skills, but otherwise is not that difficult. It then switches to an upside down UFO that requires rapid clicking and good timing, but does not need to be perfect. The player then briefly switches back into a cube with a few jumps, and goes into a couple of gravity portals. This starts up DeCode's double speed wave, which is difficult for players who have
not mastered the wave on other wave levels, but is otherwise easy and does not have many tight spaces. The wave then transitions into a gravity ball with hard timings and fake lines, but otherwise is rather simple. At the end of the gravity ball, the numbers "1, 2, 3, 4" flash up. The music then drops and the player transitions into a triple speed cube with moderately difficult timing. The cube then transitions into a UFO with an annoying amount of gravity portals that can cause extreme confusion if the player is not sure what to do. The player switches back into a cube and goes into a similar section to the previous triple speed cube, but not as hard. The player then switches into DeCode's previously "hard" slow wave, with large amounts of spikes that may intimidate the player and many tight spaces. The player then switches into a ship with a few gravity portals and requires decent flying to avoid crashing into the many spikes lined up in the section. The last section of DeCode involves a mini cube with easy to time jumps, which the level then ends with Rek3dge's name.
- DeCode used to be one of the hardest demons of its time, but was eventually changed to "Easy" because of new hard demons surfacing from hackers or extremely skilled players.
- The hardest part of DeCode was considered (and is considered) to be the half speed wave, which is now nothing compared to the majority of Nine Circles levels such as Poltergeist or Crimson Clutter.
- Decode was one of the levels TheMuteTroll used to attempt to expose Geometry Dash hackers, using Noobas' gameplay.
- DeCode was hacked by Anaban and became a free demon, but was later restored.
- Flukester made a remake of the level called FinalCode in 2.1, and it was made weekly demon by RobTop. It is mostly easier than DeCode, but the iconic slow wave has frequent speed changes, making it harder than the original slow wave of DeCode.