Halo Combat Evolved was a big deal at the time, the game's AI, large environments, and more were unseen on consoles at the time. The game still comes off very well today, with an excellent multiplayer mode, and the odd classic campaign level here and there. You can have a lot of fun with friends in Halo, with the coop mode and the PvP multiplayer.

However, I take no pleasure in admitting that the majority of the single player has not aged well, a lot of levels are copy pasted, unpolished, and boring.