The recently released Ranger Pack DLC for Metro 2033 caused players endless problems with unlocking achievements. Now THQ have issued a delightfully vague statement asking for patience as they try to "pinpoint the exact issue".
"We understand some people are still experiencing issues with achievements unlocking in the Metro 2033 Ranger Pack DLC," the publisher confirms. "We realise this is frustrating for those of you who have been waiting to enjoy the Ranger Pack DLC, and we ask for your patience as we try to pinpoint the exact issue and solution."