Worst final fights

Halo 3 (Final battle vs. 343 Guilty Spark)
The Master Chief is a badass, and you'd expect that (what used to be) his last confrontation would be something of epic proportions. He'd killed every Covenant leader who challenged him, destroyed massive war-machines, and stopped the onslaught of the Flood multiple times. So, then, who was his ultimate foe at the end of Halo 3? It was freakin\' 343 Guilty Spark, the monitor of the original Halo—otherwise known as a tiny floating sphere that was mildly annoying. And sure, it's nice to kill him finally because Guilty Spark sucks big time, but he barely puts up a challenge at all. It doesn't take more than a few pot-shots with the giant gun the chief has and you win. See also: the final confrontation with Didact in Halo 4.