In this digital age, society seems increasingly content to equate being first with being the best. So here--let me just preempt everyone reading this by saying "First!" right here and now. Of course, that won't stop anyone; people just want to feel like they're experiencing something before anyone else, planting their flag in virgin territory. Life's not a race, but don't tell the Internet that, lest you crush the dreams of the person who posted "1st" as the seventh comment on an article.
With games, being first can go two ways. Either you're remembered as the originator of an enduring, definitive trait, or you're superseded when another, more popular title takes all the credit. So let's take a look at which games were actually first, those that dared to experiment with ideas that were once innovative (even if those concepts are now completely cliché by modern standards). Sometimes, it really is worth paying homage to your precursors--the ones who paved the way for all who followed, putting forth unique ideas that just begged to be copied and iterated on.