However, you should probably complete it so you can save all collectibles/secrets.
This chapter describes only locations and ways of getting the collectibles.
Mission walkthroughs are in aseparate chapter of this guide!
Rune
To find the rune, start moving straight ahead from the entrance of the map.
A passageway will open up after the battle - use it to reach the rune.
When you jump over at the end of the road, you’ll find the secret.

Perks
You’ll get to that secret by jumping on a few columns.
BFG - 10000
You will reach this note by completing the story mission.
You have to jump on the columns to reach the upper floor and then turn left.

Toy Figure - Prowler
You will find the toy by going to the story point.
You fill find another secret there.
After you descend to the lower floor, you will have to jump into the hole in the wall.

Use dash and double jump to do so.
You will find the rune by going to the mission point.
You just have to follow the corridor.

Just jump up to a higher level and instead of going straight ahead, look behind you.
There you will find a floppy disk with a cheat code.
To get to that secret you have to go through the ventilation shaft.
To enter it, jump on the box shown in the screenshot.
To collect this secret you must perform perfect jumps between several levitating rocks.
You have to jump onto a few levitating rocks to get to this sentinel battery.
This way, you will immediately get the secret.
If you fall, you will have to repeat the entire sequence from the beginning.
The entire path is fairly easy and clear, so it shouldn’t cause any problems.
You’ll get the battery as soon as you get out of the building.
Just jump on the lower floor and turn right.
Focus on the right wall and you will notice the moving object.
You’ll find another secret by following the straight path.
Go left and check the wall.
Extra life (1-up)
You will find the first extra life on the battlefield.
you might collect it by running away from your opponents.
You will find another extra life next to the closed door.
To gain another extra life, go through the ventilation shaft and jump on an unused elevator.
you’ve got the option to get out of there by smashing the wall.
Another extra life is on a platform far away from other platforms.
You have to make a perfect jump to get there.
Once you crossed through the levitating rocks, you will reach a stable platform.
you could get the last extra life before the end of the map.
Make a few jumps to get it.
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