Of course you wouldn't be able to play the game to it's fullest with out an understanding of the Skills involved. So here's a quick look at what Alex Mercer is able to do in Prototype: [Core] Skills branch out into higher levels of said skill.

AIR SKILLS: These skills will be used more than any other skill you will aquire.

Air Stomp
(50,000 EXP)
Perform a quick drop to create a powerful shockwave. Useful to clear out a tight grouping of enemies, or stun a larger opponent for an immediate follow up attack.

Body Surf
(120,000 EXP)
Don't stop moving with the Body Surf; turn your enemy into a new form of movement. Will only work with human-class enemies.

Bulletdive Drop
(1,500,000 EXP)
From the Glide move, drop hard, drop fast for a maximum-impact splash effect with the Bulletdive Drop. The Bulletdive drop doesn't track well, but it hits extremely hard - your most powerful drop attack.

Flying Elbow Drop
(100,000 EXP)
Drop from on high with a face full of hurt. The higher the drop, the bigger the impact. The elbow drop is useful against ground-based enemies, as you can move u p high, then drop with a punishing strike.

Flying Kick Boost [Core]
(10,000 EXP)
Increase Flying Kick range, speed and damage with this upgrade. Great against Helicopters or UAVs.

Flipkick Launcher
(75,000 EXP)
Flipkick Launcher turns your enemy into a projectile. Jump kick, and then charge for launch!

Air Groundspike Graveyard Devastator
(540,000 EXP)
Drop from the sky and deliver a wave of deadly Groundspikes to impale nearby enemies. Very powerful against vehicles. Devastator Attacks can only be used when in critical mass.

Air Knuckle Shockwave
(380,000 EXP)
Pound your fists together to create a powerful shockwave blast. Not the most damaging attack, but great for clearing the air. Use during jumps to clear away weak or damaged aerial opponents.

Groundshatter
(40,000 EXP)
Pound the ground. This powerful area effect is great for clearing an area of weaker enemies by launching them into the air. Charge to increase area of effect and power of the attack.

Groundshatter Drop
(110,000 EXP)
Drop from above and create a huge ground effect. Great for clearing groups of enemies or just creating destruction. Charge or increase the height of your drop for an increased area effect and attack power.

Groundspike Graveyard Devastator
(40,000 EXP)
One of the most powerful moves available. Devastate with a cascade of deadly Groundspikes to everything nearby. Devastators can only be triggered when in critical mass.

Knuckle Shockwave [Core]
(24,000 EXP)
Pound your fists together to blast opponents away from you. Not damaging, but can buy you a lot of time when you blast enemies out of your way. Great for clearing an area among weaker foes. Charge for power power.

Tendril Barrage Devastator [Core]
(54,000 EXP)
Deadly tendrils erupt from your body to impale all nearby enemies. Most powerful against biological foes. Can only be used when in Critical Mass.

Air Combo
(135,000 EXP)
Bash your target towards the horizon with a bone shattering combo! Follows right out of the Uppercut Launcher.

Breakdown Smash
(45,000 EXP)
A devastating attack move with extra charge potential. Combo into this and charge for outstanding damage.

Curb Stomp
(120,000 EXP)
Introduce your defeated enemy's face to the hell of your shoe.

Palm Slam
(75,000 EXP)
Let your enemy know how you feel about them with a fast Palm Slam. Clears nearby enemies from your path with a directed force attack. Allows access to the Critical Pain Devastator.

Snapkick Launcher
(900,000 EXP)
Use the Snapkick Launcher to launch a single enemy into the air. Charge to increase effect.

Uppercut Launcher
(Auto)
Launch your enemy with a chin-shattering Uppercut Launcher. Follow-up while in the air, or Air Stomp down as a followup.

Charged Throw
(30,000 EXP)
Charge your throw before releasing for vastly increased range and power. Throw Charging is vital when engaging aircraft.

Hunter Dirtnap
(250,000 EXP)
Grab and slam a Hunter to the ground. A good tactical option when you're surrounded by a pack of infected, or want to get away from a single troublesome Hunter.

Long Range Throw
(50,000 EXP)
Increase your object throw range; pick off opponents more than a block away when combined with targeting. Excellent against distant enemy groups, infected hives or military bases.

Sprinting Grab [Core]
(5,000 EXP)
Sprinting Grab allows you to snag ammo or victims without sacrificing movement. Grab and run.

Sprinting Throw
(25,000 EXP)
Allows Alex to throw objects while moving.

Grapple Slam
(195,000 EP)
Whiplash any human into a shockwave knockout with the Grapple Slam, a powerful one-shot shockwave attack.