The biggest surprise of the year, if you were one of the first few thousand players who downloaded Rocket League as one of the PS Plus monthly freebies, that initial sensation of "Holy hell, it's actually good?!" would power Psygnosis' little nitrous-powered baby all the way to many peoples' Game of the Year top spot. Sequel to the Supersonic Acrobatic Rocket-Powered Battle-Cars, physics have been fine-tuned and playtested to perfection, regardless of whether you're tearing off across the field or angling your car's booster towards the ground and taking to the skies for a last-minute volley. Football/soccer has never managed to penetrate American markets or any gamer who's not already interested in the game itself, but Rocket League has seen millions of us logging in daily for just one more match. It's ludicrously fun, enjoyable, appealing and oh-so rewarding in that dynamic way only online multiplayer games can be. Psygnosis have managed to commercialise that childhood feeling of going for a kickabout in the park with your mates, and it.is.GLORIOUS. PlayStation fans - what game made you most proud of the system in 2015? Let us know in the comments!