Go to a thrift store or eBay. Search for "Popcap Puzzle Pack" or "Popcap Arcade Hits Vol. 2." You can buy the original CD-ROMs for $5 shipped. These CDs have zero DRM checks to the internet. You install the disk, type in the key (usually printed on the manual), and you have a permanent, offline Popcap Game Collection free download—because you bought the disk.
This comprehensive article explores the legacy of PopCap Games, the reality of downloading these collections today, and how you can safely and legally revisit these masterpieces. Popcap Game Collection Free Download
A unique aquarium management game where you feed fish while defending them from alien invaders. Go to a thrift store or eBay
Part pinball, part pachinko, and 100% addictive. Clearing that last orange peg to the tune of "Ode to Joy" is one of the most satisfying moments in gaming history. Zuma’s Revenge! These CDs have zero DRM checks to the internet
This isn't free, but it is $5. Valve’s Steam frequently sells the Plants vs. Zombies Game of the Year Edition for $0.99. The Bejeweled 3 collection can be had for $4.99. While not a "collection," these versions work flawlessly on modern PCs.