When the level begins, keep an eye out for ghost studs and follow them to where you need to go. Enter one of the rooms to the right. Operate the shield terminal here to find a box that Captain America can open. Follow the ghost studs again, this time to the detention cell. Use the terminal here as well before heading to the far end of the room. Captain America can then double jump to grab the poles to knock down another box to be opened. Go back to the hallway and follow the studs once again to another area. Enter the room to the right. Have Captain A hit the switch for the locked door inside where the next locked box is locked box is located.
Return to the main hallway once and follow the studs to the control room this time. Moving toward the hangar, climb onto some crates using the yellow ladder and destroy the blue boxes. Smash these and create a S.H.I.E.L.D. control panel to find the next locked box. Open that one too, Head west next to find a plane; shoot the pair of target markers. This drops one more box. Grab the items inside then head back to the laboratory, which is your very starting point of this level.
Minikit #01: This is tucked away behind a crate to the rear of the room, to the right.
Next up, will be Hulk attempting to chase Black Widow down. Take control of the latter and start running towards the screen (or foreground), hopping over objects onto the mobile platforms until the chase sequence ends.
Red Hulk Character Token: Check the eastern section of the room to find a switch that Captain America can use, just after the first Hulk chase sequence.
Minikit #02: Complete the second Hulk chase sequence, then have someone who can use a scanner check the middle of the room to show an extra blue handhold on the forklift. Pull on this handle to find this minikit.
Minikit #03: Complete the second Hulk chase sequence, then have Thor power up the electric terminal.Send someone with stealth capabilities to slip past the camera for this collectible.
Minikit #04: Amidst the third Hulk chase sequence, you'll find an agility wall to climb up of and get this minikit at the top.
Just keep running from Hulk until Thor comes in to help you out. Go through the QTE prompts until the fight ends to proceed.
Minikit #05: During the battle with Hawkeye, you must find and destroy a total of five silver control terminals. Check the along the left and right sides of the room to spot them.
Classic Hawkeye Character Token: Look around the eastern section of the area for a cabinet with a red handle. Pull that for this token.
Minikit #06: Send a flight-capable character up onto the balcony on the west side of the area, then use Hawkeye to smash through the glass here and go inside.
Now for the battle with Hawkeye, try to take care of the goons first, while keeping an eye out for Hawkeye's arrows. You cannot hurt him yet so just stay on defensive until his arrows run dry. At this point, Hawkeye will improvise using a banana. This will be your opportunity to counterattack so start shooting him. There are about three phases to this fight, where Hawkeye will switch to different arrow types. Just avoid them, kill off the goons then attack Hawkeye when he resorts to bananas.
Minikit #07: Check the pair of S.H.I.E.L.D. terminals in the area using a Hydra agent, so that both ends of the banner are lowered. This minikt appears after said task is accomplished.
Minikit #08: Off to the back of the area are four separate pieces of the S.H.I.E.L.D. logo. Use telekinesis to reassemble these back to their place on the wall.
Once the area is set ablaze, use stealth Nick Fury to work with the S.H.I.E.L.D. terminal to the right to extinguish the flames. Build a tech panel out of the bricks that appear. Check the folders and match a total of four icons then hit the S.H.I.E.L.D. logo to proceed. Go left now, build some poles out of the bricks that you find then use use Maria to get past the flames. Repeat the process with the S.H.I.E.L.D. terminal and tech panel, then head over to the middle of the room and work the switches there. Go and attack Hawkeye.
Minikit #09: Once you get to the third part of the level (where your team switches to Captain America and Iron Man), Climb the steps off to the west side of the starting point, and have someone with a scanner check the wall in the back. Use Thor to power up the electric panel for this piece.
Studs x10 Red Brick: The Collector can be seen chilling at the starting area and he needs to get his hands on a Captain America Card. Use Ultron to pry the black bricks from the wall just behind the Collector, and build a drone to get the card.
As Iron Man, clear away the destructible silver objects, hop over the gap, drop off at the next platform and bust up another object. Create a pole that Captain America can use to get to the next platform. There, use Iron Man to destroy the gold brick overhead then continue onward with Captain A. Have him extinguish the fire and create a switch from the resulting bricks. Pull that one and a golden wall should appear underneath the platform.
Stan Lee In Peril: On the platform directly across from the Collector's location is a vent that Vision can pass through. Destroy the object in there to find Stan Lee.
Minikit #10: Once you've succeeded in making the gold wall appear underneath the platform, Look for a tiny booth and hypnotize the person inside. He will then break things so you can get this minikit.
As Iron Man, carve an exit through the golden wall with his lasers then smash some objects in the room that you emerge into. Use the resulting bricks to power up the elevator. Take Cap to ride elevator so he can reach Iron Man's location.
Skaar Character Token: Have Thor use his hammer to smash through the cracks above the elevator, then send someone to fly up and get the token.
Smash the objects by the wall to the right of the lift then have Cap activate the switch. Use Iron Man to clear away the objects blocking access to the agility wall. Cap can then use the wall to reach the next platform. Smash the boxes and build handholds that you can navigate so Captain America can reach the switch that completes the level.