Just picking up kickass guns, loads of ammo and killing an interesting mix of enemies to
collect keycards to open doors and making it the exit.
Not exact matches
Other items to find include
keycards that open locked doors and bonus items which give score (Keen gets an extra life if he
collects enough score).
Other items to find include
keycards that open locked doors, bonus items which give score (Keen gets an extra life if he
collects enough score) and the Ankh, which gives temporary invulnerability.
You'll fill your inventory with these to put them to use, using a broken robotic arm to
collect an out of reach
keycard, or
collecting blood to lure an animal from its burrow.