Today we've got a great giveaway for our dedicated Co-Optimus readers! We're giving away five copies of Serious Sam HD: The First Encounter on Steam to five lucky readers. You may be asking yourself why we'd be giving away the game now, almost two years after it was released. That's because if you decide to purchase the upcoming Serious Sam 3: BFE through Steam and own any previous Sam product, you'll get 10% off. It's like we're not only giving away a game, but giving you free money. Sweet!