"New mechanics" refers to fresh and innovative ways of doing things, especially in areas like technology, sports, or games. It implies the introduction of novel techniques, rules, or methods to enhance things or solve problems. Full definition
There are a number of new mechanics in the game such as combination movements when in battle or more in - depth quick time system. (articles.gamerheadquarters.com)
The gameplay remains stellar, however, with clever level designs that contain multiple pathways a la 16 - bit Sonic, with new mechanics added throughout the adventure to keep it all fresh. (wizarddojo.com)
So is this going to introduce new mechanics into the game? (neogaf.com)