There are alien plushie collectibles for each map in Tony Hawk’s Pro Skater 1 + 2.
This includes the special maps like Chopper Drop and Skate Heaven.
Here are the locations of all alien plushies in each map in THPS 1 + 2.
1. Warehouse
This one’s the easiest. After spawning, go down the ramp and you’ll see a half pipe on your left.
The alien plushie is located above the half pipe that’s further inside.
2. School
For the School map, you will spawn on the green platform. Instead of going straight, look towards your right. Go towards the building on the right side of the elevated walkway.
The alien plushie is hidden inside the corner as pointed out in the image.
3. Mall
As for the Mall, you will come across an area with both a downward ramp and stairs that are separated by a structure.
This is near the Flying Leap Gap.
If you look behind, you’ll see a Parking Elevator. The alien plushie is beside it.
4. Skate Park
For the Skate Park, you have to look behind where you spawn.
There’s a container and you need to get up on it. To go up, just use the usual Wallride and grinding. You will find the alien on the container.
5. Downtown
For the Downtown map, you need to get to the rooftop first. You should come across this area (same area where you need to jump to the other rooftop to complete the Gap).
Look for the half pipe with the black plastic bags. You need to go over the half pipe and there’ll be a small area for you to stand. If you overdo it, you will fall down the rooftop.
Another way is to grind on the half pipes first and then jump to the small area.
The alien plushie is right behind the same half pipe.
6. Downhill Jam
Downhill Jam is probably the easiest. When you spawn, just look behind.
You will see the alien plushie on one corner.
7. Burnside
For Burnside, you need to get up the beam.
As you spawn, go towards the left and you need to use the half pipe to land on the beam (image below).
You will find the alien plushie as indicated in the circle below.
8. Streets
For the Streets map, you have to look for Margo’s Diner. As you descend from the spawn point, go towards your right and you’ll immediately see the building on your right as well.
You need to get on the red awning using the quarter pipe. The alien plushie is on the awning.
9. Roswell
For the Roswell map, you need to enter the Restricted Area, which is the Area 51 building. Just head towards the door and it will open automatically.
The alien plushie is on your left as you enter the building.
10. The Hangar
The first map in THPS 2 is The Hangar. To get the alien plushie, you need to open the secret area.
Do a grind on the helicopter’s rotor and the gate will open.
Go to the outdoor secret area and look towards your left to find the alien plushie at the corner. It’s pretty dark so it’s not as visible.
11. School 2
For School 2, you have to get to the area where the Library is.
The aim is to get on this green awning (image below).
To get onto the green awning, you can use short wall under the awning to Wallride, grind and kick-back. You will land on the green awning.
Once you’re on the awning, head towards the Library’s direction and look towards your left. The alien plushie is in the corner of a small space.
12. Marseille
The alien plushie in Marseille is in the secret area. Look for the wall made out of wooden planks.
To break down the wall, look for the lamp pole.
Knock into the small stick on the pole (circled below) and the entire pole will fall down.
You will reach this area. The alien plushie is hidden in the circled area shown below.
13. NY City
The alien plushie in NY City is towards the right of your spawn point. You should see the Upper Bank building. Go towards the lower floor of the building.
You will find the alien plushie behind a half pipe.
14. Venice Beach
The alien plushie in Venice Beach is hidden at the secret wooden plank walkway. When you spawn, go towards your left and you’ll see these half pipes.
Go up the exact half pipe as shown in the image below.
You will reach the secret wooden walkway. The alien plushie is hidden behind the half pipe.
15. Skatestreet
For Skatestreet, you need to open the secret area first.
Grind on the hanging rail (image below) and the door will open.
Go outside and look for this half pipe.
Use it to reach the top of the wall.
You will find the alien plushie on the wall itself.
16. Philadelphia
The alien in Philadelphia is inside the skatepark.
To open the skatepark, you have to grind on the cable as shown in the image below.
The poles will fall and open the skatepark for you.
Inside the skatepark, head towards the right, as circled in the image below.
The alien plushie is behind the half pipe.
17. The Bullring
The Bullring is quite simple. You simply need to reach this walkway near the seating area. Just go in a circle and you’ll see the alien plushie here.
18. Chopper Drop
For the Chopper Drop map, the alien plushie is located above one the half pipe in front of your spawn point (image below).
19. Skate Heaven
As for Skate Heaven, you’ll need to enter the volcano to find the plushie. Here’s how you can unlock and enter the volcano.
Once you’re in, you will see the alien plushie hidden behind the half pipe on the left-most side.