Check out the bundle options at this link.

Open the door to a dizzying universe of game development possibilities with this bundle of Unreal Engine and Unity assets. You’ll get a vast trove of ready-to-use game assets for the two most popular game engines in the world—everything from gritty cyberpunk sets and serene seaside vistas, to weapons from across history, high quality icons for your UI, and stunning special effects. Also included in the bundle are a host of tutorials to broaden your skillset, as well as handy plugins that you can quickly add to your workflow. Pay what you want for this vast toolbox of assets valued at over $3,000 and help support Direct Relief with your purchase!

You can always check out the most recent Humble Bundle offers here and here.