No More Room in Hell 2 Offline Solo Mode
What Solo Mode does in No More Room in Hell 2 version 1.0, what progression it disables, and why local execution does not confirm fully offline play.
Quick answer
Version 1.0 has a native Solo Mode that runs the map locally instead of on a game server. It disables normal progression and permadeath, but official material does not confirm that the game can launch and play without an internet connection.
What Solo Mode is for
Solo lets you enter maps alone to learn objectives, practice routes, and test a build without risking a permanent character loss. You do not earn the normal progress or rewards from these sessions.
That design separates training from the live account economy: you can experiment safely, but you cannot use Solo to farm progression.

Local is not the same as offline
The developer described Solo as running natively on your PC rather than on servers. The game’s EULA, however, says an internet connection is required.
With no official statement explicitly promising offline launch, “offline solo” should be read as a search term, not a confirmed feature label. Plan for connectivity unless a current platform page says otherwise.
Known console issue at 1.0
The 1.0 known-issues list says Beginner supply drops may not appear in Solo Mode on PS5 and Xbox Series X|S. This is a documented launch issue, not a rule of the mode.
Early Access guides saying there is no solo mode are now outdated; they describe the game before Armageddon.