I’ve found a new multiplayer mod for Half-Life 2 on ModDB and it looks pretty cool, just thought I’d post it here as I think everyone here might enjoy it. 
It comes out on July 4th according to the website.
https://www.moddb.com/mods/the-invaders-source
EDIT: Just found out it is headed by one of the GoldenEye: Source developers, should be good. 
It’s a nice looking mod that is way under the radar. However they still have a lot of work to do on their level design, especialy on their robotic class.
I agree that the level design is a bit off, I hope that they continue to support it after release. 
Founded in 2004, Leakfree.org became one of the first online communities dedicated to Valve’s Source engine development. It is more famously known for the formation of Black Mesa: Source under the 'Leakfree Modification Team' handle in September 2004.