Leo loved Left 4 Dead 2 . He’d played it for years on his old gaming PC, but now he only had a small laptop with barely 10 GB free. Internet at his new place was slow and capped.

You can download L4D2 in 20 minutes instead of 20 hours.

Left 4 Dead 2 runs on Valve's Source Engine. While the Source Engine is known for being optimized, the "Highly Compressed" versions of L4D2 are popular because the base game, with all updates and DLCs (like The Passing , The Sacrifice , and Cold Stream ), can swell to over 15 GB or more.