Supersoldier John-117, better known as Master Chief, repeatedly saves humanity from invaders from the alien Covenant alliance. Players have come to love this saga because it allows them to feel like they are on the battlefield — all thanks to the well-tuned gameplay, large open levels and smart opponents. The Master Chief Collection is an ultimate collection for anyone who wants to get to know Halo. It has not only numbered games in the series, but also branches that reveal the universe more deeply — Halo 3: ODST and Halo: Reach.