0:00 - #1 - Earth Area 1a • Above the last stack of boxes in the area. Unlocks Jet Ray.

0:22 - #2 - Earth Area 1b • Above the first short building on top of the other building. Unlocks Paradox.

0:33 - #3 - Earth Area 2a • Above the first fountain in this area. Unlocks Swampfire.

0:39 - #4 - Earth Area 2a • Above the second tree branch after three brick cubes and a bench. Unlocks Azmuth.

0:49 - #5 - Earth Area 2b • On the first platform of the first building. Unlocks Goop.

1:01 - #6 - Mr. Smoothy • After the second table, on the broken bulb of the light post. Unlocks Mr. Smoothy.

1:08 - #7 - Vulpin Area 1 • Right-most bottom area of the level. Unlocks Vulpin.

1:24 - #8 - Darkstar • Above the spawn point. Unlocks Darkstar.

1:29 - #9 - Vulpin Area 1 • Below the last platform (backtrack with Spidermonkey). Unlocks Spidermonkey. • Must backtrack after unlocking Spidermonkey.

1:39 - #10 - Vulpin Area 2 • Bottom-left of the level behind the Humungousaur barrier. Unlocks Ship. • Must backtrack after unlocking Humungousaur.

1:51 - #11 - Terradino Area 1 • You can jump down from a higher platform towards the end of the area, located after using Swampfire to destroy the vine wall. Unlocks Terradino.

2:03 - #12 - Terradino Area 2a • To the right of the first vine. Use Spidermonkey to swing on the upper branch, and keep going to the right until you reach it. Unlocks Humungousaur.

2:13 - #13 - Terradino Area 2a • At the bottom of the vine at the end of the area. Unlocks Upchuck.

2:35 - #14 - Charmcaster • On the broken pillar next to Charmcaster. Unlocks Charmcaster.

2:43 - #15 - Encephalonus IV Area 1 • On the path of the lift in the beginning area. Unlocks Encephalonus.

2:54 - #16 - Encephalonus IV Area 2 • To the right of the beginning area in the lower hidden area. Unlocks Echo Echo.

3:01 - #17 - Encephalonus IV Area 2 • Use Spidermonkey to swing under a platform towards the end of the level. A Humungousaur door is at the bottom of this wall. Unlocks Brainstorm.

3:18 - #18 - The Vreedle Brothers • At the center of the level, double jump with Spidermonkey. Unlocks Vreedle Brothers.

3:28 - #19 - Mor' Otesi Area 1 • Use Spidermonkey to go down the wall after the first forced enemy encounter. Unlocks Cooper.

3:38 - #20 - Mor' Otesi Area 1 • Hidden down a wall where two green crystals are at. Unlocks Mor' Otesi.

4:01 - #21 - Mor' Otesi Area 2 • Between two green crystals on the high platform towards the end of the area. It is directly beneath it! Unlocks Chromastone.

4:28 - #22 - Albedo • Defeat Albedo and go to the right. Unlocks Albedo.

4:36 - #23 - Null Void Area 1 • On a floating platform. Use Spidermonkey to swing up to the platform. Unlocks Null Void.

4:52 - #24 - Null Void Area 1 • Underneath the exit platform and slightly to the right. Unlocks Big Chill.

4:56 - #25 - Null Void Area 2 • Beneath the exit platform and follow floating rock path. Unlocks Alien X.

5:05 - #26 - D'void • Far right of area. Unlocks D'Void.

5:15 - #27 - Earth (Vilgax) • At the beginning of the level near a destroyed car.

5:23 - #28 - Earth (Vilgax) • Above the second tire of the overturned police car. Unlocks Psyphon.

**Credited to: https://www.ign.com/faqs/2011/ben-10-alien-force-vilgax-attacks-walkthrough-1151037#Option23