why do you want to play out of steam though? If you login on steam on other computers then you'll still be able to play blockland.
I can understand where OP is coming from. Personally, I don't run Blockland through Steam because it eats up more resources. Also, keep in mind when you install steam onto another computer; Steam makes you verify through email, which is handicapped, but can be disabled in your steam account options.
It seems more efficient to have Blockland on a flash drive without being dependant steam.
You can pop it into any computer, copy and paste your key from a txt file and your done.
I didn't know this was an issue :O
It definetly would be great if steam blocklanders could have a key emailed to them