Well cant remember myself ever paying for a 90 minute game. I probably bought some during the 32 bit days but cant remember which now. Probably Omega Boost? Anyways I am not sure if GZ is worth the money. But there always can be outliers. This might be or might not be one. 90 minutes is the main mission. But it wasnt defined how much extra content might be there. Some MGS games were short. MGS1 was also fairly short. But it had so much content, so much experimentation, it had so much variety that it felt like a much richer experience than a 20+ hour game. There are many large games that you get bored to finish them once. They are dragging and dragging with fillers just to hide the lack variety and increase the length. MGS games were gems that during the days that I had more time to game, I finished multiple times and loved every single second spent. So few games manage to get so much replayability.