24#7 gaming hub for left 4 dead 2

The Last Stand will include more than 20 new Survival mode maps, updated animations, restored voicelines ("It's a ♥♥♥♥♥ apocalypse now, ♥♥♥♥♥" makes me think that maybe those lines were cut for a reason), new melee weapons, two new mutations, 30 new achievements, and "a plethora of bug and exploit fixes.

The Last Stand campaign - The survivors decide to take an alternate path in hopes of salvation, but is this path truly safe?

30 brand new achievements - New and unique milestones to strive for!

26 new survival maps - How long can you survive against the endless hordes?

4 new scavenge maps - Wait, people still play scavenge?

2 brand new melee weapons - Hunt down a Jockey with the pitchfork or whack it with the shovel. Satisfaction guaranteed!

L4D1 infected - The L4D1 infected are back, and they're bloodier than ever!
New and previously unused voicelines for survivors - Rochelle has a personality now!

New character animations - New, improved and overhauled animations by our skilled modding team!

Reworked gun models and animations - The guns now behave more like real guns!

PvP enhancements and balance changes - New attack spots, new tank spawns, and hundreds of new infected ladders for the competitive modes!
Official implementation of CSS weapons - The CSS weapons are now available to everyone!

Brand new mutations Rocketdude and Tank Run - Ever wanted to launch yourself around with a grenade launcher, or run away from hordes of tanks? We've got you covered.

Improved UI options - Singleplayer option for more gamemodes, Versus Survival is officially brought to the main menu, easier gamemode switching, and new outro stats!

Hundreds of bug and exploit fixes - The days of falling through elevators are gone!
Source: PC Gamer