How to play as infected in single player

[RokkOn]

Due to request of a few people, I decided to post how to play versus in single player.
Go to steam/steamapps/common/left4dead/left4dead/cfg and make a new file called "spversus.cfg". Now, copy and paste all of this in your cfg file:
echo "SPVersus mode activated!"
sv_cheats 1
director_no_human_zombies 0
sb_all_bot_team 1
unbind "F1"
unbind "F2"
unbind "F3"
unbind "F4"
unbind "F5"
unbind "F6"
bind "F1" "z_spawn boomer"
bind "F2" "z_spawn smoker"
bind "F3" "z_spawn hunter"
bind "F4" "z_spawn tank"
bind "F5" "z_add
bind "F6" "z_spawn witch"

Then close the file, save it and make it read only, because left4dead likes to edit files. Anyway, start up left4dead in single player, doesn't matter what map, type "exec spversus.cfg" in console. Then press your team switch key and switch to infected. You can spawn as, or when you have already spawned, spawn a boomer with F1, a smoker with F2, a hunter with F3, a tank with F4, a common infected with F5 and a witch with F6. But, you will notice the so-called "zombie ladders" are missing! To fix this, you have to change to the versus levels instead of the co-op levels. type "changelevel l4d_vs(fill in the rest, the console will give you suggestions about existant maps from there on. hospital is no mercy and farm is blood harvest).
Have fun!

How to switch team even when you reached the limit:
Simply type "vs_max_team_switches 10" in the console to join a team infected even when you have reached your limit. You may want to use sm_cvar vs_max_Team_switches 10 so you don't have to use cheats.

Update:
Spawning as a special infected with z_spawn works again! Just type "give health" in console or better yet, bind it to a key, and it will work again! Your HP is normal, hunters can pounce again, your HUD appears and you no longer have 1 HP.

Update #2

You may also want to try the "all4dead" plugin for sourcemod.
http://forums.alliedmods.net/showthread.php?p=751952
Combine sourcemod and this plugin and you can use sm_cvar to alter cheat-only cvars without turning sv_cheats on, and all4dead features a handy menu that can do a lot more. Including spawning infected. All4dead will notify players of every all4dead action, but this can be turned off. Note that automatic spawning (meaning that the director chooses where to spawn it if you try to spawn an infected) is on by default. You can turn this off with a4d_automatic_placement 0 or use the admin menu-all4dead settings. This will toggle if the director chooses where to spawn the infected, or not spawn it at all if it's not fair, and toggling it off will spawn it at your crosshair. And all4dead automatically gives the spawned infected it's health so that it won't have the no-pounce no-hud no-hp glitch.
If you use all4dead you can host an spversus game while players can still join your game.
Simply scrap everything out of your spversus.cfg and replace it with this:

echo "SPVersus mode activated! Have fun!"
a4d_automatic_placement 0
bind F1 "a4d_spawn_infected Boomer"
bind F2 "a4d_spawn_infected Smoker"
bind F3 "a4d_spawn_infected Hunter"
bind F4 "a4d_spawn_infected Tank"
bind F5 "a4d_spawn_infected Common"
bind F6 "a4d_spawn_infected Witch"


Then use the sm_admin menu and go to all4dead settings-versus settings to alter if the game requires 1 human survivor and alter if it's a versus game.

Have fun!

[linfosoma]

Interesting, I need to practice my hunter pounces.
Just wondering, why do you need to unbind those keys?

[RokkOn]

I just added the instructions for the F# keys.
@linfosoma: Because the keys are then already bound to certain things. Voteyes and voteno to F1 and F2 and something else to F4, but I forgot what it was. But as soon as you exit the session, your keys will be set back to what they were.

[drunkenrobot]

How do you create cfg files?

[RokkOn]

You create a new .txt file, change the extension to .cfg. That's it.

[grep]

Very cool! have rep, man!

[RokkOn]

Also, I'm still trying to figure out if there is any way to make boss infected spawn at versus rates, and there are already a few console commands that look like it, but sadly, they don't work.

[Marcan]

That's great, thanks.

[CENSOR]

Erm, does this not work for anyone else either?

I made the doc, named it correctly, did all that. But in game after I type "exec spversus.cfg" in console, it says "exec: couldn't exec spversus.cfg"

[Marcan]

Check the file path and that you put it in the correct folder.

[RokkOn]

Put the cfg file in steam\steamapps\common\left4dead\left4dead\cfg. If you COPIED AND PASTED the list that I gave what the contents should be, and it's in the correct folder, it should work. Unless you made a typo in the file name. Either in the console or the file itself.
Ontopic: I think I finally found the console cmd for special infected respawn rates:
z_special_spawn_interval #

[The_Musician]

old news is old.

[herschede16]

thanks for the info

what does z_add do though?

[mystrdat]

This has already been covered in Essential Console Commands thread.

[gotrice42000]

do you need to be connect to the net for this to work?