| Easter Egg | Effect |
| Big Balls | Bigger Football |
| Big Hits | Louder Hits |
| Blinders | No Penalties |
| Bunyon | Bigger Players |
| Coffee Break | Speed juiced |
| Con Man | CPU Hides Pass Coverage |
| CPU Scores | CPU Players Are Faster |
| CPU Stuffs | CPU OL Has Super Strength and speed |
| Credits | View Credits |
| Davis | Running Back is Juiced |
| Euro League | All Players Have European Last Names |
| Even Teams | All Players Are Equal |
| Flea Circus | Tiny Players |
| CD Challenge | Bonus Difficulty Level |
| Grudge Match | Red Redzones Checkered Endzone Invisible Uprights |
| Hangtime | Longer Hangtime on Punts |
| Hot Shot | CPU Player Celebrates in the Field |
| Invisible | Invisible Players |
| Mind Reader | CPU Knows Your Play so like normal? |
| Playing Cards | Flat Players |
| Pole Axe | Forearm is Juiced |
| Pop Warner | Small Faster Players |
| Presidents | Players Are Named After Presidents |
| Prime Time | CPU Makes Big Plays |
| Puppets | Players Have Red String Attached to Head |
| Rocket Man | Ball Carrier Has Speed Bursts |
| Slideshow | See Cheerleaders After a Game |
| Skeleton | Play as Skeletons |
| Sports | All Players Have Last Name From Credits |
| Stamina | Juiced Endurance |
| Steel Leg | Longer Field Goals |
| Stickem | Great Hands for Receivers |
| Swimmers | Swim Move Juiced |
| Tele Tummy | TVs in Players Stomachs |
| Weak | Quick Fatigue |
NFL Gameday '99 - Playstation
