Following is a list of events in the game. By default, all events are available for both sexes unless otherwise noted:
Track
Sprints: 100 metres, 200 metres and 400 metres
Middle distance: 800 metres and 1500 metres
Hurdles: 100 metres hurdles for women and 110 metres hurdles for men
Field
Jumping: Long jump, triple jump, high jump and pole vault
Throwing: Discus throw, javelin throw and shot put
Swimming
100 metres breaststroke, freestyle, backstroke and butterfly
Gymnastics
Artistic: Floor exercise (separate gameplay for male and female), still rings (men only) and vault
Equestrian
Show jumping (mixed gender event)
Weight lifting
+105 kg. clean and jerk (male only)
Archery
70 m individual (female only)
Shooting
Skeet shooting (male only)
Source: Wikipedia, "Athens 2004 (video game)", available under the CC-BY-SA License.