A sequel to the first Entropy: Zero. This is a significant improvement all around! It's still using Half-Life 2 as a framework, so there's some stuff inherent to that, which I just don't care for. But all things considered, this is a fairly decent mod, with some rougher bits here and there. As someone who dislikes Half-Life 2, I will acknowledge that I do think this is more fun than Half-Life 2 itself. Stuff like being able to shoot while zooming in, or the Xen Relay Grenades, can be fun to utilize.