House of the Dead 2

Power-ups
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You'll find power ups in Original Mode that make it quicker and easier to get through than Arcade Mode. Most power-ups lie in boxes, crates, and barrels - shoot everything (except hostages). A lot of power-ups appear while enemies are onscreen, so act quickly if you plan to collect the goods. 
Head Shots
As you make your way through the levels, you'll encounter different ghoulish adversaries, each with their own attack. Practice your head shots and learn to rely on them--Most Zombies go down with a single shot to the cranium. (Remember that many Zombies can withstand three to four shots to the body or limbs.) 

Center Enemies
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With the Analog Pad (or Left Trigger) center your sights often: a good amount of the enemies appear near the center of the screen. Once you're proficient with your firearm, it's not a bad idea to speed up your gunsight, too (Options). This allows you to move your sight and track enemies faster. 

Saving Hostages
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The most important aspect of getting through the game is saving hostages - that's why you're here! It's also the quickest and easiest way through the game. The routes you follow are determined by which hostages you save (or fail to save), as well as other triggering actions, such as whether or not you shoot objects in the game, like keys or locks. Saving hostages gives you safer routes to follow, all leading the end of the level. 

Secrets
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1. Save all hostages: a bonus room will open in the last hallway before the Final Boss. 
2. Score more than 70,000: another secret room opens in the same hallway, a special costume is your reward. 
3. Score more than 100,000: get an infinite Credit power-up and an alternate ending. 
4. To have the score appear onscreen during gameplay: press L, L, R, R, R, L, R, and then the START button on the title screen.
