"Gameplay additions" refers to new features or elements that are introduced into a video game to enhance the overall experience, such as new abilities, levels, challenges, or mechanics. Full definition
A huge amount of content (at least 15 hours) a massive map and some interesting new gameplay additions make The Following a must buy for fans of the original game. (player2.net.au)
That's definitely a possibility though, with some of the other gameplay additions giving you plenty of options. (nintendowire.com)
One significant gameplay addition was the Variable Assist, which would call your partner in for a quick attack and was useful in extending combos. (eurogamer.net)