Beating Alpha in Time Attack with Zack was one of the most frustrating things I've ever done.
I almost totally forgot how frustrating DOA4 was at times. Yeah, the unlocking procedure was a looong and frustrating one. D: I hated Alpha and Team Ninja so much for it. A few days ago I also noticed how frustrating DOA2 Ultimate could be at times (even though it was always my favorite game of the series). Already on normal difficulty level the characters block and most of all counter like crazy. It's just one big counter-fest and playing against AI Gen Fu is a nightmare...
So glad they reduced that in DOA5. u.U