Unlimited ammunition:
     Hold L + R and press X, B, A, B, B, Y at the CompStat/Map screen.

Unlimited endurance:
     Hold L + R and press X, B, A, B, A, X at the CompStat/Map screen.

Double damage:
     Hold L + R and press A, A, B, A, A, A at the CompStat/Map screen.

$1 million:
     Hold L + R and press B, B, Y, B, Y, B at the CompStat/Map screen.

Super cop mode:
     Hold L + R and press Y, A, Y, A, Y, Y at the CompStat/Map screen.

Ultra easy mode:
     Hold L + R and press X, B, A, A, Y, X at the CompStat/Map screen.

Redman Gone Wild mini-game:
     Hold L + R and press Y, A, A, B, A, B at the CompStat/Map screen.
Alternately,  get  a 100% game completion. Go to the location given by
Redman when he calls.