Lock the ability to leave before 50 waves.
After 40+ runs on legend and not a single player willing to help completeit to 50 waves. Its such a total waste of time getting to complete just one 50 wave, over 1hr in time.
Adding insensitive to stay is a waste as players will just continue to load out after 10 waves.
Lock the ability to leave will actually make player commit to competing the full 50 wave run.
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No reason to stay. Playing 10 waves or 50 waves, basically the same rewards. You get 1 extra chest for finishing 50. Hilarious design.