Die Hard 1

To enter these codes, press ESC to pause the game, 
then hold down the R and 2 keys while typing the 
desired code. If you entered it right the game 
will unpause automatically. 

God mode: Right, Up, Down, E

50 of each weapon: Right, E, Down, O

Weapon select: Right, Up, Down, Down, E, Right 
(repeat for different guns)