The only thing that you did right on this is the actual port. When I play it my game crashes right after 2 or 3 seconds. There are so many bugs I can go through. Play your own campaign for once and think about what you have created.

Terrible campaign. No navemsh on chapters 3-5. Safe rooms are non functional on chapters 3-5. Finale is non functional. Terrible campaign. Needs to be fixed desperately. However I did like that the finale was classic L4D1 style.

I must be one of the few who actually still remembers when Ausimus was still active and worked on this port of his. This was one of the first L4D1 ports before Valve did it themselves. He last updated this campaign in September 2010... TWENTY TEN! SIX YEARS AGO. Obviously there might be some bugs and glitches and issues of that nature. Deserves a much better rating, in my opinion, it truly used to be a straight direct exact port of No Mercy. So if you still want a proper port, I think your only other option is "No Mercy: Modified" by 1sg_heartless.

CONS: Bots froze at Map 3,4 and 5

Every single time me and my friend have tried to play this mod, we get as far as map 3 before we get a flow error stating that the director is unable to populate the map. The map then has no zombies, special or common, and the bots won't leave the safe house. It was great up til that point, but once you reach that point it becomes unplayable; I'm pretty sure that even if you run all the way to the safe house, you can't win the game unless the bots are either with you or dead--which sucks.