[L4D on L4D2] [No Mercy Original V5 on Left 4 Dead 2] [SPEED EDIT]
This is on Easy Mode for the purposes of demonstration. Sorry for the fullscreen appearance, I still use an old CRT monitor (not a widescreen.) This is L4D1 map "No Mercy" with little alterations, yet made playable in L4D2. Also, I am using a custom ported Zoey model. Unfortunately there is no Zoey sounds to replace Rochelle's voice overs.
Download the campaigns, models and get more information at the following: L4D on L4D2 (I maintain this website)