Easily Defeat Final Boss:
When fighting the final form of Muro, run circles around the big oaf. Then, when his sheild-thinggy disappears, slide into him like mad. Just be careful when applying this tactic, because you have to change your direction frequently to keep him confused. Also, don't get between Muro and anything solid, as he will then pummel you to death. And, if you don't like the long wait for his invulnerability to go off, run just far enough so that he uses his those little tractor-beams. Avoid being sucked in, and his shield will deplete even faster. NOTE: there is no need to EVER go to the lower level of the arena! There are no pick-ups down there, and if Muro gets you with his beams, and he's still up on the higher part, he'll drop you to almost-death.

It Pays to be Nice:
Help out the scientists and other hostages and they thank you with usefull items.

Hint for Beating the Ninja:
In the mission before the ninja boss get a auto pistol and when the boss begins fire at the nninja and keep him at range, when you are out of ammo use the slide to kill him without to much trouble.

Finders Keepers:
-On the bio research lab defeat Barabas and run down to the windows of the reception look left and right and see 2 gaps in the wall then pick up the stuff in the gaps.
- On the airport kill the strikers and instead of going into the airport run up the street and find a car on fire and a Hypo. Carry on running up the street and find a man who gives you a hypo.
- On Dr.Hasegawa's lab go to the bit where you kill the ninjas and go through the door on the right then in stead of following Shinatama, jump on the smokey glass and look under the slope and find a energy cell