Entropy: Zero 2 is an amazingly fun game mod that I highly recommend trying out so long as you have played the previous one too. (Entropy: Zero).

Playing a grumpy, unlikeable, Combine Elite of all things... You should hate him, but Bad Cop somehow manages to grow on you as you learn more about him, his backstory, and the unfavourable terms even those who sided with the Combine faced.

It makes this game mod more than just a classic 'bad guy' playthrough.

Plus; New guns! New Vehicles! New Allies and new mechanics. (Kicking in doors and kicking around random props, boxes and corpses is pretty fun).

If you have and enjoyed HL2, give this pair of mods a go. Now. Go. It's free.