Money raised by a Humble Bundle offering will be used to partially fund development of Serious Sam 4, Croteam has announced.

The developer is offering a week-long pay-what-you-want deal for Serious Sam HD: The First Encounter, Serious Sam HD: The Second Encounter, Serious Sam: The Random Encounter, Serious Sam Double D, Serious Sam: Kamikaze Attack, and Serious Sam Public Test 2 DRM-free on PC, with some Mac, Linux, and Android versions also available.

“All funds to Croteam will go towards making the upcoming Serious Sam 4 the craziest and greatest Serious Sam game EVER,” said the company.