$20 for Battlefield 4 on Origin, just follow these instructions.
Step 1:
Go to
http://www.dpgamer.com/
Step 2:
Enter one of these codes
413M4D
4712M9
4912HA
48VU64
4979P3
497D79
Step 3:
Enter that code in Origin for $10 off a $30 purchase. (BF4 is on sale for $30)