Square Enix and game streaming service OnLive have teamed up to offer buyers of the PC version of Deus Ex: Human Revolution free access to that game via OnLive. But that, it seems, doesn't fly well with GameStop.

The high street retailer has confirmed that it's told its employees to remove the OnLive coupons from all copies of Deus Ex on PC.

An email apparently sent to employees reads: "Please immediately remove and discard the OnLive coupon from all regular PC versions of Deus Ex: Human Revolution."

It adds: "Our desire is to not have this coupon go to any customers after this announcement." Several tipsters have apparently told Gamespy that their new copies of the game were previously opened and the coupon missing.

Confirming the details of the email, a GameStop rep said: "Square Enix packed the competitor's coupon with our DXHR product without our prior knowledge and we did pull and discard these coupons."

Deus Ex: Human Revolution has wowed critics with stellar review scores this week. But if you're in US and want your OnLive code, you should probably buy the game elsewhere.