What the sources actually say
Steam explicitly lists Online PvP, and the official overview describes large 50v50 battles. This makes online multiplayer the verified core experience.
Steam also displays a Singleplayer tag. Tags can be broad or ambiguous, so the tag alone cannot prove an offline campaign, bot match, tutorial, or solo queue.
What a complete answer still needs
A reliable answer needs an official FAQ, a current mode list, or direct in-game verification that names the solo feature and states whether it works offline.
Buy for the verified multiplayer experience, not for an assumed story campaign. Recheck official mode details if solo play is a purchase requirement.
Sources
Sources were checked on August 17, 2026. Store, review, population, and patch facts may change.
- Official Hell Let Loose: Vietnam overview Official feature, faction, map, role, and mode overview.
- Hell Let Loose: Vietnam on Steam Store facts, features, pricing, requirements, and review snapshot observed August 17, 2026.
Refresh rule: Recheck the official FAQ and in-game mode list after updates.