So far there's two strong candidates for the title:

· Metal Gear Solid V: awesome gameplay which was filled with innecesary and repetitive sidequests, main missions that can be breaken down in two types (kill/capture this unit, go to this specific point), and incomplete story with a dumb plot twist that goes nowhere. I don't know what they were thinking. I never liked Peace Walker much, but there's so much content and diversity in there as opposed to MGSV, it's incredible how things turned out.

· Dead RIsing 3: decent gameplay with a large (albeit dead) city to explore, but the game's soul was lost somewhere. I don't know if it is the evidence that Inafune was needed, or that the team lacked direction altogether. The game doesn't really evolve much, and the story is simply atrocious; cheap and easy bosses (although some of them were very fun to battle), useless time constrains (it's like the dev didn't understand why they were there in the first place) and lack that colour touch from the supermarket/casino setting. This game alone kicked out Dead Rising as one of my favourite franchises ever, because...ugh. It's so disappointing it hurts.

Xenoblade Chronicles X.

Definitely not a bad game, but the final product doesn't feel 100% polished, and in terms of the story, I thought it was a lot weaker compared to Xenoblade on the original Wii.

I also preferred Xenoblade's gameplay a little more with the Monado and chain attack system, as opposed to the overdrive system, and soul voices, though the skells are awesome as hell.

The entire WiiU library

Firewatch. I was rather hyped for it, but it ended up being pretty meh :/

Really? Because, if anything, touchscreens are becoming a Nintendo staple (3DS, the WiiU, and probably the NX) , and it was adopted by other companies (the Vita has a touchscreen, and mobile gaming is entirely based on touchscreen).

Then again, if this is irony and I'm just making a fool of myself, blame Poe's Law. :P

Mario 3D World

Some will disagree with me on this one, but it was a pain to finish

IMO of course

Halo 5 online is a blast for me but I agree with MCC. Still broken online, I don't have problems finding matches anymorebut the spawn points in halo ce and 2 make them unplayable. 

LoL, Wtf, you said that Metal Gear Solid, is  your favorite Franchise, so how dare you Play a game that have a premisse of  a Plot, and you don't care about the Plot ?, with so much games that were much worse than Metal Gear Solid V, like Tony Hawk, and his "Bonecão do posto"s Physics, what i said is that the game have the Physics, like Tony's Body were this thing  That stay on Gas Stations.

Evolve,  and Guitar Hero, Rock Band, the games with So much Microtransactions, DLC, that even if you spend 100 thousands of Dollars you  will not get the Entire Game.

To be honest, I never cared for Halo's story that much. I've always like the gameplay tho.

Xenoblade Chronicles X.... or Fallout 4.
Both are great games, I just had insanely high expectations.