The Source engine is a 3D game engine developed by Valve Corporation. Its unique features include a large degree of modularity and flexibility, an artist-driven, shader-based renderer, accurate lip sync and facial expression technology, and a powerful, efficient and completely network-enabled physics system.
One of the best engines I have ever seen.
Why do I like it?
There are 2 main reasons:
Fully custom,
so you can enjoy anti-lag gameplay
for low end PCs or
Beautiful graphics for High end.
The Source engine has lots of potential,
(as titanfall has shown us)
I love this engine.
It gave me games
such as
Half Life 2, Portal
and Titanfall.
Thanks Valve.