XPMath: King Kong's Prime Numbers (flash)

SheppardSoftware: Fruit Shoot (flash)

SoftSchools: Prime Numbers Up To 100 (flash)

MathPlay: Prime and Composite (flash)

HelpingWithMath: Prime Number Game (flash)

MathNook: Math Puppies (flash)

MathNook: Which Number? (flash)

SheppardSoftware: Monkey Drive (flash)

Braingle: A Prime Number Problem