Flash back ten years or so. I'm still in college and my roommate and I discover the wonders of having an apartment with a T1 line in it. Before we've even unpacked the kitchen, the computers are networked and Quake III matches are in full swing. I rarely talk to my old roommate anymore, but still count those early FPS fights as a good gaming memory. Quake Arena Arcade is a game for players, like me, with these same memories. When it wasn't about Perks or Prestige, but how quick to the draw you were with a mouse.
The old Quake engine hasn't aged too well, but offers a nice look at what passed for "Amazing Graphics" a decade ago. Quake Arena Arcade offers everything in its original form (so no new player models), only at a much higher resolution. It won't wow the younger set, but I loved it just for the nostalgia. Corridors splattered with dark reds, blues and browns; maps that aren't really anything at all... all are a significant part of my gaming history. It would be like looking at an old print of King Kong and saying the gorilla looks fake.
The same goes for audio. You get the booming announcer's voice and that weird synth/industrial techno music filling in the gaps between rocket bursts and other battle sounds. It doesn't impress by today's standards, but I'm cool with that.