Serious Sam is on sale on Steam, and this weekend is no different. If you've yet to pounce on one of the preceding deals, then know you can get 75% off the game this weekend -- whether you want to snag the games piecemeal or all together in one bundle.
Serious Sam HD: The First Encounter and Serious Sam HD: The Second Encounter are marked down to $3.74 and $4.99, respectively. The Serious Sam Gold Edition, which includes both HD remakes and the original PC games, is $9.99. If you're looking for just the HD remakes, then you can snag them both in a bundle for $7.49.