Still no one's created this thread? Guess I will.
Tried having Stuntman use powers on every single turn in a round, all under his own power. Actually got 4 power triggers on the villain's turn but was out of guns. Then used Steal the Scene on both other heroes' turns and used a couple of powers on the environment turn, finishing off with In Medias Res and winning the game on his own turn with Violent Escalation. Pretty sure I played every card in his deck, and had copies of all permanents in play at one point (though not at the end). No unlock.