What are cool mods to play?!?!??!?
 

Hey everyone,
There are a lot of Half-Life and Half-Life 2 mods released or getting release in a few months from now.
I resently find out that a lot of people don't know about some cool mods or never play mods at all.
In my oppinion mods keep a game alive. A mod can even be as good as the game itself.
A good example for this is "Rock 24". This is an amazing singleplayer mod for HL2. One of my favorit HL2 multiplayer mods is "Pirates, Vikings and Knights 2.
These 2 mods are both listed in the Steam 'Game Mods' list. But there are also a lot of great mods which are not listed in Steam. That's why we should all list them here.

What is, in your opinion, a Half-Life (2) modification that everyone should have played???

What are cool mods that are coming out soon???

I will make a start:
SP - Flipside (Released) FLIPSIDE for Half-Life 2 - Mod DB
A short original gameplay with a 2d look

MP - Zombie Master (Released) Zombie Master for Half-Life 2 - Mod DB
1 Zombie Master versus all the other players (the survivors)

MP - Revolt The Decimation (Released) Revolt The Decimation for Half-Life 2 - Mod DB
A very nice looking shooter, th problem is that less people play it so almost every server is empty

SP/MP - Jurassic Park (IP) Jurassic Park for Half-Life 2 - Mod DB

SP - The Way (Released) The Way for Half-Life 2 - Mod DB
A short mod, with original control system. It also looks very nice.

MP - Insurgency (IP) Insurgency for Half-Life 2 - Mod DB

Revolt and Source forts have to be the best mods I have ever played. Revolt could use a few tweaking, but so far its a really really good game.