£15 CDKeys PlayStation Store credit for £13.99, to get the price down to £13.30 use the Facebook CDKeys page 'like' discount code. This is very useful for getting the anticipated Frozen Wilds DLC for potential GOTY Horizon Zero Dawn cheaper for PS+ members to approx. £11.60.

Horizon Frozen Wilds is £14.39 with PS+ on the PS Store (store.playstation.com/!/en-gb/games/addons/horizon-zero-dawn-the-frozen-wilds/cid=EP9000-CUSA01021_00-HZDDLC0PREORDPSN ), and can be cheaper if you use CDKeys to get the £15 PSN card for just £13.99 via the 'Get Deal' link and use their 5% Facebook like discount to get the card even lower (£13.30).

Thanks stevenjameshyde 2 m ago ''Frozen Wilds is at best £12.69 with this method (you buy Frozen Wilds + 61p of credit for £13.30). Still a great price''

From rumours (discovered by Jorraptor) the Frozen Wilds DLC will be at least 10 hours. He also made videos on a glitch found in game where you can 'fly' by mounting a Strider and walking through a high level building in [well, can't really mention the location because of a possible spoiler, as it is related to a major side mission you need to complete for the Platinum trophy], and you can fly close to the location of the Frozen Wilds DLC and check the place out (of course within the boundary limits otherwise the game will reset you back inside the gameplay area, and also make sure you don't get hit along the way by those pesky glinthawks or the beast stormbirds otherwise Aloy would fall to her death).