Gearbox Software again offers SHiFT Codes for use on the PlayStation 3, Xbox 360, PC, or Mac versions of Borderlands 2 for free. That's tied with our mention from last week as the best offer we've seen on these codes, which give you access a Golden Key that in turn allows you to access certain in-game content. Deal ends March 18 at 12:55 am ET. The codes:

• PlayStation 3: CTK3B-99K3J-XXKW3-ZTWTJ-HJH5J
• Xbox 360: KJCJ3-RCWC6-5K9BF-WFBT3-3WFKK
• PC / Mac: KTCBJ-C9RTC-BSFTJ-33TT3-FBWHF