Extra ammunition
     If  you  run  out ammunition but have enough Tequila Bomb for the
"Precision  Aim",  aim at someone and shoot. This will create 20 to 30
more  rounds for the handgun. Always try to have a enough Tequila Bomb
for "Precision Aim" in the event you run out of ammo.

Secret theater
     On  the  first  level,  after  the second checkpoint when you are
walking  in  the door take a right. You will see a damaged door. Shoot
it and walk through the corridors. You will end up at a secret theater
that  shows  two previews of games, The Wheelman and Blacksite Area 51
There  is  also  a  golden pistol, a paper crane, and a shotgun in the
theater.