Since this is the game de jour and I'll bet people are gonna get this for x-mas, there's a thread for the unlockables.
This might make is easier to keep this list active, as the other thread is getting long and cluttered. Post your discoveries, and we'll update it here!
From the old thread DP posted Ken Love's list:
Per Ken Love @ Activision, here are the "unlockables":
[EDIT: corrected the requirements list based on our personal observations. Hey, I'm only reporting, I didn't find these on my own!]
Atlantis
Disco Mode = Score 30,000.
Barnstorming
Barnstorming Commercial = Complete Field 1 in 33.5 seconds or less.
Patch = Complete Field 3 in 54 seconds or less.
Beamrider
Patch = Reach Sector 14 and score 2500.
Boxing
Corporate Commercial = Beat the computer opponent.
Chopper Command
Motion-Blur Mode = Score 4,000.
Chopper Command Commercial = Score 6,000.
Patch = Score 8,000.
Commando
No unlocks.
Cosmic Commuter
Has one unlock, we don't know what it is.
Crackpots
Bungee Mode = Score 25,000.
Patch = Score 17,500.
Decathlon
Bronze Patch = In single-player, score 8,000.
Silver Patch = In single-player, score 8,500.
Gold Patch = In single-player, score 9,000.
Demon Attack
No unlocks
Dolphin
Warped Mode = Score 10,000.
Patch = Score 15,000.
Secret Society Patch = Score 25,000.
Dragster
Patch = Race 20 times.
Enduro
Patch = Drive over 2500 miles!
Fishing Derby
Distortion Mode = Beat the computer opponent.
Freeway
Freeway Commercial = Score 30 points on Game 1.
Patch = Score 10 points on Games 3 or 7.
Frostbite
V-Hold Mode = Score 4,000.
Patch = Score 12,000.
Grand Prix
Grand Prix Commercial = Track 1 in under 45 seconds.
Patch = Track 1 in 0:35, or Track 2 in 1:00, or Track 3 in 1:30, or Track 4 in 2:30.
HERO
Patch = Score 75,000.
Has another unlock, we don't know what it is.
Ice Hockey
Ice Hockey Commercial = Score 4 points in under a 2 minutes against the computer.
Patch = Beat the computer.
Kabobber
Activision Commercial = Score 10,000.
Kaboom!
Kaboom Commercial = Score 150.
Patch = Score 200.
Keystone Kapers
Patch = Score 10,000.
Laserblast
Laserblast Commercial = Score 10,000.
Patch = Score 100,000.
1,000,000 Patch = Score 1,000,000.
Megamania
Starfield Visualization = Score 5,000.
Megamania Commercial = Score 15,000.
Patch = Score 45,000.
Moonsweeper
Hyperspace Mode = Score 1,000.
Oink
Patch = Score 5,000 in Game 1.
Pitfall!
Pitfall Commercial = Score 12,000.
Patch = Score 20,000.
Pitfall 2
Cube Mode = Score 45,000.
Patch = Score 99,000.
Plaque Attack
Whirl Mode = Score 7,500.
Patch = Score 10,000.
Pressure Cooker
Patch = Score 15,000.
Private Eye
Patch = Complete Case #3: “Dealing in Diamonds”
River Raid
Cloud-Cover Mode = Score 4,000.
River Raid Commercial = Score 8,000.
Patch = Score 12,000.
River Raid 2
Ricochet Mode = Score 16,000.
Robot Tank
Breathing Mode = Eliminate 37 enemy tanks.
Patch = Eliminate 48 enemy tanks.
Seaquest
Patch = Score 35,000.
Skiing
Skiing Commercial = Beat slope 1 in less than 35 seconds.
Patch = Beat slope 3 in less than 32 seconds.
Skyjinks
Patch = Complete field 1 in 37 seconds.
Space Shuttle
Patch = Dock 1 times and land .
Commander Patch = Dock 3 times and land.
Spider Fighter
Tilt-O-Vision Mode: Timer == 180 seconds
Patch: Timer == 300 seconds
Stampede
Multi-Screen Mode = Score 1400.
Stampede Commercial = Score 1,000.
Patch = Score 1500.
StarMaster
StarMaster Commercial: 120 second timer (game 1)
Ensign Patch: 300 second timer (game 1)
Leader Patch: 300 second timer (game 2)
Wing Commander Patch: 180 second timer (game 3)
Supreme StarMaster Patch: 220 second timer (game 4)
Tennis
Tennis Commercial = Beat the computer opponent.
Patch = Beat the computer opponent.