How to Fix an Offline License Grace Period Abused by Staying Offline

You allow offline play after a successful license check, which is good for legitimate users on planes or with spotty internet. But if the grace never expires or relies on the device clock, an unlicensed copy simply stays offline forever. Bound the window using server time and re-verify on reconnect.

How to fix it

1. Anchor the window to server time

Record the last successful verification as a server timestamp, and compute the remaining offline window from a monotonic clock so rolling the device clock back does not extend it.

2. Re-verify on reconnect

When connectivity returns, silently re-check entitlement and refresh the offline window. A copy that never passes a fresh check eventually runs out of grace.

3. Keep legitimate offline play smooth

Set the grace generously (days, not minutes) and fail gracefully, so real customers are never locked out by a flaky connection while unlicensed copies still expire.

Catching the ones you can't reproduce

The hardest version of this to fix is the one you can't reproduce — it only happens on a player's hardware, OS, driver, or save state, under conditions that simply aren't present on your machine. A report that says “it crashed” or “it froze” gives you nothing to act on, so the bug survives release after release while quietly costing you players.

Automatic error capture closes that gap. Each failure arrives with its full stack trace, the device and OS, the build number, and a breadcrumb trail of what the player did right before it broke, so even a failure you have never seen becomes a specific, reproducible issue. Fold identical failures into one signature ranked by how many players each hits, and your worklist sorts itself worst-first instead of arriving as a stream of vague complaints.

This is where a tool like Bugnet earns its place. Its SDK captures every error automatically with the full stack trace plus device, OS, memory, build, and game-state context, folds duplicates into one grouped issue with an occurrence count, and ties each to the build it first appeared on — so you fix the problem that hurts the most players first and confirm it is gone when its signature disappears from the next release.