Location of all hidden Cosmic Cubes across the campaign.
Prologue
The first cube is almost impossible to miss, located right after the Watcher tells you how to use team attacks.

New York City
The second cube will be located on the bottom right balcony of the apartments, right after the Arthosians burst out of the Daily Bugle truck. Much easier to get with a character that can fly!

Genosha
The third cube will be located in the top right, directly in front of the Sentinel conveyor belt.

Helicarrier
The fourth cube will be on your left immediately after exiting the elevator portion of the stage.

Savage Land
The fifth cube will be near the lake, soon after you first enter the brush and avoid the rampaging dinosaurs.

Wakanda
The sixth cube will be after you witness Annihilus bombing Wakanda. Once you clear the debris, it’ll be near the benches where the Arthosians are cheering.

Blue Area of the Moon
The seventh cube will be directly in front of the gate that attempts to attack you with its tentacles, behind two of the bug sacs. (not shown)

Asgard
The eighth cube is hiding behind two barrels once you run past Hela’s crows and encounter the shield bug blockade.

Destromundo
The ninth cube will be slightly to your left on the second level, right after you get off the lift that the A.I.M. grunts were occupying.

Klyntar
The tenth cube will be when you start to hear Knull, high above the area with the three symbiote balloons you need to destroy. A hero that can fly is also highly recommended here!

Hala
The eleventh cube is a bit tricky, located in staff of one of the Kree statues that are scanning the area. Again, a hero that can fly is recommended to make this easier to grab!

Sanctuary II
The twelfth cube is to the right of the huge monitor, right after clearing the first hallway and hearing the exchange between Thanos and Phyla-Vell.

Fort Galactus
The thirteenth cube will be hidden by some rocks, right after you hear Cosmic Ghost Rider mention that you must be getting closer to the Silver Surfer.

Heteropteron
The fourteenth cube is to the right of the long hallway, in front of the webbed area where one of those annoying spiders shoot at you. One of the Queens of Annihilation will start to speak when you’re nearby.

Arthos Citadel
The fifteenth cube will be above a generator right before you get on the bridge where Galactus helps you clear a huge swarm before reaching Annihilus.

NYC Rooftops
The sixteenth and final cube will be in front of the Baxter Building on the top platform, where Annihilus begins his final attack on New York.
