The confirmed tunnel answer
The official game page confirms that NVA forces can build extensive tunnel networks for surprise attacks. That is the current, source-backed description of the system supplied for this project. It establishes faction, construction and tactical purpose without publishing an exact cost, range, count or placement rule.
A tunnel should therefore be understood as a hidden-movement and surprise tool within the NVA battlefield plan. It changes how a squad can think about approaches, reinforcement and pressure. The page does not turn that broad purpose into a fictional technical manual.
Why beta details are not current facts
The detailed tunnel video in the collected material is explicitly labelled “Outdated Beta Version.” That label matters because exact mechanics from a beta can change before or after release. The source can show what players were trying to understand, but it cannot by itself verify the current live values. It is retained only to explain why the detailed rules were removed.
For that reason, this page removes exact construction rules, tunnel limits, distances, resource costs and interaction timings that appear only in the outdated material. The omission is deliberate and follows the project rule to delete uncertain information. Current live behavior should be checked in the game and official update notes.
How tunnels affect a squad plan
The official wording ties tunnels to surprise attacks, so their first strategic question is approach rather than decoration. An NVA squad can think about how hidden movement changes the pressure on an objective, while opponents need to read the possibility of an unexpected route. The supplied sources do not prove a universal tunnel layout or counter pattern.
Use the mode structure to give the system context. Warfare is a five-sector tug-of-war, and Offensive has attackers and defenders; a tunnel’s value depends on which side is trying to move or hold. Keep the objective visible instead of treating every tunnel as automatically useful.
Tunnels alongside other Vietnam systems
The official feature page places NVA tunnels beside US helicopters, armed patrol boats, swimming, climbing and fast crawling. That combination creates an asymmetrical setting where both sides have different ways to move support or pressure. The page confirms the broad system purposes but not a full faction tech tree.
The tunnel guide should therefore be read with the roles, vehicles and maps pages. A squad’s choice depends on the current objective, available unit and terrain, not on a static claim that one system always dominates. This also avoids importing community opinion about balance as if it were a confirmed mechanic.
A source-safe tunnel checklist
When reading a tunnel report, separate three questions: is it an NVA system, does it support surprise movement and is the specific rule confirmed for the live build? The first two are supported by the official game page. The third requires current in-game or official evidence, especially for values copied from the beta video.
This page does not publish tunnel count, range, cost, health, cooldown or exact counterplay. If the official team adds those details later, they can be recorded with a dated source. Until then, the accurate answer is the tactical purpose and the explicit beta boundary.