Splatterhouse

Not too difficult a game to beat. Make sure that you invest in the health, necro, Splatter Smash and weapon upgrades as a matter of priority. You'll also want to take the grab move that allows you to tear off arms (press 'b' twice), as this not only gives you a weapon, but insta-kills the enemy. Hitting 'b' while holding a weapon is a one-hit kill on the normal enemies as well.

There only a few points that can cause problems:

Neon blue zombies crop up on a regular basis. They rip off your arms, cause massive damage, and are a pest. Use weapons, or grab them and Rick slams them for an insta-kill. If you can't do that, charge them (RT and Y), it sends them flying and two or three hits should kill them.

Late in the game you'll meet some zombies that glow red, and which cause damage if you hit them with light attacks. Charged heavy attacks will hit them no problem, or you can use weapons, smash and slash, or berserker mode.

Meat Factory - there's a point where you need to cross a room filled with giant fans, crossing a floor that falls away. After crossing three panels, fighting enemies all the way, you then need to turn around and go back to the entrance. Listen out for the warnings that the mask will give you, and everything should be fine.

Final Boss - don't go to the Corrupted, stay near Jen on the slab and fight off the enemies that attack her. Use lots of slash, smash, and rip arms off as much as you can. If Jen dies, you lose. The boss eventually approaches and launches into a QTE, at which point you get a checkpoint and a straightforward QTE to finish the game.

Other than that, use Splatter Smash on the larger enemies as it causes massive damage and recovers health. Splatter kills are good but slow, so use them in the campaign and then forget them for the Survival Arena.

There are plenty of resources out there on the interwebs giving you suggestions on strategies for completing Splatterhouse, so I'm going to skip that part of it, but I wanted to put out a list of good resources all in one place for the overall completion of the game. Below is information on walkthroughs, collectibles, Survival Arena S ranks, and beating the bosses. Good luck, and enjoy this incredibly gross and awesome game. ^_^

*Full Video Walkthrough

*Collectibles Guide

*Survival Arena S Ranks
Tips
Arena 1: West Mansion Lobby
Arena 2: Slaughterhouse
Arena 3: West Observation Room (Part 1/Part 2)
Arena 4: The Death Coaster (Part 1/Part 2)
Arena 5: Shadow of the Wickerman (Part 1/Part 2)
Arena 6: West Manor Chapel (Part 1/Part 2)

*Boss Fights - Direct YouTube Links (embedded videos below):
Phase 1: Satan's Masque
Phase 2: The Doll that Bled
Phase 3: In the Shadow of the Abyss
Phase 4: The Meat Factory
Phase 5: The Corpse that Wouldn't Die
Phase 6: Beast with a Human Heart
Phase 7: Scream Park
Phase 8: Reflections in Blood
Phase 9: The Ruined Heart
Phase 10: The Wicker Bride
Phase 11: Blood Eclipse
Phase 12: The Devil Made Flesh