Board Thread:Plants vs. Zombies 2/@comment-29272355-20180717201755/@comment-1764483-20180723144941

Technically, hacking the free stuff is as simple as setting a single bit in the right spot in the right file.

But if you want a real answer, I believe that the upgrade bundle is a nice deal. Four useful upgrades plus some seed packets for sunflowers and such. (Trust me, the 8th seed packet is extremely useful.)