Data derived from
And yes, I know that 2015 isn't over yet. But there are only two titles left for 2015, Xenoblade Chronicles X and Pokemon Mystery Dungeon.
So, let's assume both will match the scores of their previous titles (which Xenoblade is unlikely to do given import impressions) that would give us a +149 for total score (90 theoretical for Xenoblade, 59 theoretical for Mystery Dungeon) and a 29 for total software in 2015.
Which leaves us with 70.2 average, still the lowest in the past ten years. Just some food for thought, could be because the extremely low software output this year or because of low quality titles such as Amiibo Festival and Mario Tennis.
Edit: 2015 from Sony and Microsoft from user sörine:
sörine;186371288 said:Average Scores 2015
Nintendo: 69.89 (27 games)
Sony: 76.06 (16 games)
Microsoft: 80.82 (11 games)
Unscored 2015 games:
Nintendo
amiibo Tap: Nintendo's Greatest Bits (Wii U)
EarthBound Beginnings (Wii U)
Flipnote Studio 3D (3DS)
Mario & Luigi: Paper Jam (3DS)
Nintendo Badge Arcade (3DS)
Nintendo Presents New Style Boutique 2: Fashion Forward (3DS)
Pokémon Shuffle (iOS)
Super Pokémon Mystery Dungeon (3DS)
Xenoblade Chronicles X (Wii U)
Sony
Beyond: Two Souls (PS4)
Fat Princess: Piece of Cake (Vita)
Hardware: Rivals (PS4)
Hustle Kings (PS4)
Helldivers (PS3)
Helldivers (Vita)
Journey: Collector's Edition (PS4)
MLB 15: The Show (PS3)
MLB 15: The Show (Vita)
Run Sackboy! Run! (Vita)
Microsoft
Happy Wars (One)
Halo: Spartan Assault (iOS)
Screamride (360)
Squid Hero for Kinect (One)
State of Decay: Year One Survival Edition (PC)