Doom 3

Step onto Mars for a wild ride packed with danger and monsters. In the game "Doom 3", things go sideways fast—strange experiments open up a doorway to somewhere nasty, and you end up facing a parade of creatures you'd rather never meet. You play a rookie, dropped in at the worst possible moment, and your job is to find a missing scientist hiding somewhere in the twisting hallways of a research base. Gates to a nightmare realm have cracked open, and now you're the last line of defense holding back a flow of snarling demons and shambling horrors. Tools, weapons, and your wits are all you've got to clean up this Martian mess.

How to play?

Your mission is clear from the start: explore the base, arm yourself, and track down that missing scientist. Move through dark corridors—sometimes you must choose between shining your flashlight and holding your weapon, so keep alert and plan. Watch out for monsters hiding in the shadows; blast them before they get close. You'll find computers that unlock new doors, and a PDA you can use to grab passcodes, videos, and secret tips that help you move forward. Check your supplies whenever you pick up medkits, ammo, or new gadgets. Don't waste your stronger weapons on easy enemies; save those when you run into a nasty boss. Work through three difficulty settings: each one means tougher enemies and meaner fights. Keep an eye open for dead ends or hidden paths, and try not to get surprised—sometimes creatures spring out when you least expect it. The game autosaves at the start of each level, so you'll always have a checkpoint from which to restart if things go south. Stay sharp, move carefully, and don't forget to swap your gear as you go deeper into the Martian base.