Flash version of one of the great classics of all times. Kill your enemies, collect the keys and items, open the doors, find the secrets and go to the next level!
Arrow keys to move. Mouse click or CTRL key to shoot. Space bar or double click to open doors. Keys 1-7 to change weapons. Many other keys enable you to interact with the map ou activate special functions (pause, save, etc.); you can check them at any time by pressing the F1 key.