Invincibility:

L Button + Down

R Button + C-Right

R Button + C-Up

L Button + Right

L Button + C-Down

R Button + C-Up

L Button + Right

R Button + Down

L Button + Left

L Button + R Button + C-Right

All Guns:

L Button + R Button + Down

L Button + C-Left

L Button + C-Right

L Button + R Button + C-Left

L Button + Down

L Button + C-Down

R Button + C-Left

L Button + R Button + C-Right

R Button + Up

L Button + C-Left

Maximum Ammunition (not infinite)

L Button + R Button + C-Right

R Button + Up

R Button + Down

R Button + Down

L Button + R Button + C-Right

L Button + R Button + Left

R Button + Down

R Button + Up

L Button + R Button + C-Right

R Button + Left

Line Mode

R Button + C-Down

L Button + R Button + Down

L Button + Right

R Button + C-Up

L Button + R Button + C-Right

R Button + Up

L Button + Down

L Button + Right

R Button + C-Left

R Button + C-Up

Invisibility

R Button + C-Left

L Button + R Button + C-Up

L Button + R Button + Left

L Button + R Button + Up

R Button + Up

L Button + C-Left

R Button + C-Up

L Button + C-Down

L Button + R Button + Left

R Button + Right

Invisibility in Multiplayer

L Button + C-Up

L Button + R Button + C-Left

R Button + Up

L Button + C-Right

R Button + C-Left

L Button + Right

L Button + R Button + C-Left

L Button + C-Right

L Button + Up

L Button + R Button + C-Down