BenKii: Yes it was the full version of Amplitude for PS4 & PS3. In my library it says I own the full game of both. I'm only able to download the PS3 version since I only own a PS3 but I assume if I owned a PS4 I would be able to download that version as well. The trick was to add the free PS4 demo to your Playstation library then the $20 price tag on both the PS3 and PS4 full games changed to free. I added both to my cart and acquired them for free. I believe by now Sony has fixed this glitch but can not confirm since it just shows up as "Purchased" for me.
Ah, right, thanks. As i said, previously there was some errors on the store (one of them was a Ubisoft game, Trials Fusion i think?) similar to that one but in the end it was just the demo, not the full game. Congrats to those to manage to get it in time, played the demo and it wasn't my thing.