Lego 4 Dead

Played your incomplete map and finished in about 2 hrs, Expert Single Player Mode

Checkout my complete walk-through for this campaign through the link below:

h\t\t\ps://www.youtube.c\o\m/watch?v=lqqLU6QCFAA&list=PLOFtKLS6rEvn9Cjsyvzqb_Wy8_kOZzNkN

Copy the URL, Remove \ from (h\t\t\ps) & (c\o\m), then Press Enter
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Ch1 was the hardest and the most with bugs like invisible walls/objects. it was restarted twice and the switch alarm/run to safe room panic events are harder for me. There was 1 scripted witch by the panic event that caused my death once and caused the death of a bot when I passed it.
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Ch2 was passed from the first time and it's the 2nd hardest after 1st chapter and had some invisible objects.
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Ch3 was restarted once because of a bad death situation and the panic event by its beginning wasn't clear enough as I didn't camp on first try thinking that something was wrong and that was the end of that chapter. 
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Encountered 2 witches/1 tank & 1 witch in first chapter, 1 witch and 1 tank in the second chapter. 3rd chapter had only 1 witch.

My rate for this campaign starts from 2.5/5 stars because your actual maps are 3/6 maps. 0.5 star is off for the bugs like so many invisible objects, some invincible spots for survivors and some bad bot navigation issues. Hope you get back to complete and fix what you started. Good luck.