People were not exaggerating how good Entropy: Zero 2 is. It's definitely the best Half-Life 2 expansion mod. If I didn't know it was a mod, I would assume Valve paid someone to make another Half-Life expansion. It manages to somehow scratch that itch for both Half-Life 3 and Portal 3 at the same time. It is a little slow at the begining but the last two-thirds of the game is super well designed. Highly recommend it to people who like Half-Life. It's also free