Left 4 Dead 2 challenges

All 16 Left 4 Dead 2 challenges, grouped into 3 categories. These are the same challenges the wheel spins from and the daily page picks from.

Weapons

Tier one Any

Pistols, SMGs, and pump shotguns only. No tier two weapons.
Shotguns Any

Shotguns only, including pistols as a backup.
Melee primary Any

Your main weapon is a melee weapon. Guns are for specials only.
No throwables Any

Molotovs, pipes, and bile jars stay on the ground.
Single pistol Any

One pistol. No dual wield.
Iron sights feel Any

No laser sights.

One chapter Any

Play a single campaign chapter from saferoom to saferoom. That is the whole challenge.
No kits Any

Do not use a first aid kit. Pills and adrenaline are allowed.
Close the door Any

Every door you pass that can be closed gets closed behind the team.
Alarm last Any

If there is a car alarm or a panic event you can avoid, you avoid it.
Expert pace Any

Play on advanced or expert.

Four survivors Group

A full team of four. Bots are allowed only to fill, and a human takes the lead.
Shove specials Group

Smokers, hunters, and jockeys get shoved or melee killed before they are shot, when you are close enough.
Share pills Group

The first pills or adrenaline you find go to the survivor with the lowest health.
No friendly fire shrug Group

If you incapacitate a teammate, the chapter is a fail.
Same room Group

Do not split across two rooms unless someone is pinned.