5. Fallout 4
4. Super Mario Maker
3. Splatoon
2. Halo 5: Guardians
1. Rocket League
Fallout 4 is a good game. But that's all I can really say about it. It's big, yes. It's fun, yes. But it lacks the extra something that these other games deliver.
Super Mario Maker was the greatest thing that Nintendo has done with 2D Mario in his entire history. His most recent 2D platformers were getting a little stale, and Super Mario Maker is just what it needed to get out of the rut. It's fun and easily replayable to make more and more levels.
Splatoon is a brand new Nintendo IP and it is absolutely amazing. Nintendo is known for their existing franchises, and often get scorned for never branching out, but Splatoon is classic Nintendo with vibrant colors and gameplay while being an entertaining shooter.
Halo 5 is amazing. Jaw dropping. Stunning. The multiplayer is frenetic and fast-paced. It does not get much better than Halo 5 multiplayer. However, the only thing holding Halo 5 back was the bonehead decision to ditch local splitscreen. Bad move, 343.
Rocket League is insane. Trying to explain its gameplay and fun to people unfamiliar with the title is futile and hopeless. But once you have tried it out, you can see why it receives such high praise. Anyone can play and once you have mastered basic techniques, the skill moves you can perform at the highest level are truly wild. The most important thing on why this game received first place is because I've had the most fun with this game this year. And that should be weighed more seriously than graphics or sound or anything else.