Offline is a feature claim that should be tested, not assumed from a search query.
WORKED CHECK 01
Map the feature
A rules page can work locally while a multiplayer room still needs a connection. Ask whether the specific practice mode is designed for offline use and whether it includes computer opponents.
WORKED CHECK 02
Try a controlled check
Finish any required setup using a trusted connection. Then open the practice screen with connectivity disabled and note which functions remain available. Do not assume the result applies to every screen.
WORKED CHECK 03
Read a failure correctly
A failed lobby connection does not prove a corrupted installation. Re-enable connectivity, inspect the error, and consult publisher support without repeatedly reinstalling.