i have tested it on my BFBC2 cd-key from steam and it works. it should also work for the retail version
1. download origin (http://store.origin.com/)
2. login
3. copy your BFBC2 cd-key from steam or any other source
4. redeem your cd-key in origin
5. select BFBC2: Deluxe Edition
you'll get BFBC2 vanilla + vietnam for free on Origin
1. download origin (http://store.origin.com/)
2. login
3. copy your BFBC2 cd-key from steam or any other source
4. redeem your cd-key in origin
5. select BFBC2: Deluxe Edition
you'll get BFBC2 vanilla + vietnam for free on Origin