When you first get Medusa's Gaze and are asked to kill all the minotaurs, refuse the tutorial and instead cast Poisiden's Rage over and over. Kratos will have infinite magic in this "training" room since the game expects you to learn the Medusa gaze attack. With the respawning enemies, magic, and Poseidon Rage, you can rack up huge comboes and gain enough XP to max out Kratos early.

Remember to stock 25 to 30 thousand more XP than you need at that time so you can max out your weapons, magics, and skills later on.

After defeating the Hydra and beating the first level, you'll appear inside a large ship with two topless girls nearby. Jump onto the bed and press CIRCLE to start a sex mini-game. If you complete themini-game you'll be rewarded with red orbs.

You can make Kratos move faster by rolling forward (press the Right Analog Stick forward) and cancelling the end of the roll with a Hermes Rush shoulder charge (press R1 when you've leveled up your Blades of Chaos). Repeatedly roll and shoulder charge to move forward at a much faster rate than Kratos' normal running speed.

After beating God of War's Challenge of the Gods, you'll unlock five new costumes for Kratos. Apart from just looking different, Kratos actually has different attributes for his damage power and defense power, and will also collect different levels of health, magic, and red experience orbs.