Electro Bolt – fire lighting strikes (shooting water makes it become electrified)
Level 2: chain lighting striking multiple enemies is charged up
Level 3: you’re able to fire an extended beam of lighting while non-charged shots will strike multiple enemies

Telekinesis – use object or enemy bodies as projectiles
Level 2: you can pick up heavier items and cause more damage
Level 3: you can pick up any object, including living enemies!

Incinerate – ignites a single enemy.
Level 2: Charged up shots ignite multiple enemies
Level 3: Charged up shots act like a flamethrower. Non-charged shots act like a firebomb.

Security Command – when fired up at bots or turrets causes them to attack any target.
Level 2: When charged up, summons a maximum of two security bots
Level 3: When charged up, summons boosted security bots

Scout – become invisible and move around without being noticed. You can also fire plasmids in this state, but in order to progress, you’ll have to return to your physical body.

Level 2: You can also hack security and vending machines

Winter Blast – freeze enemies for a period of time
Level 2: When charged up, enemies become blocks of ice (and can also be used with Telekinesis)
Level 3: Charged attacks fire beams of ice while non-charged ones act like a level 2 Winter Blast

Hypnotize – you can cause a splicer to attack anything nearby
Level 2: Charged up shots cause the targeted splicer to follow you as an ally for a few minutes.
Level 3: Make a Big Daddy friendly for a few minutes

Cyclone Trap – enemies that step on a trap are thrown in the air and get major damage when they fall.
Level 2: you can charge the traps with other plasmids (electro, incinerate etc) and make them cause extra damage
Level 3: you can place the traps on walls and ceilings too

Insect Swarm – send a swarm of bugs to attack an enemy
Level 2: the swarm will attack multiple enemies
Level 3: enemies killed by the swarms become hives, causing enemies stepping over them to get attacked by swarms, too.

Decoy – create a clone of yourself to distract enemies
Level 2: your clone will reflect damage to your enemies
Level 3: the clone reflects damage and heals the player at the same time

Credit the unigamesity