Full list of all 210 Seen achievements. It takes around 6-8 hours to unlock all of the achievements in the base game on Windows.
The base game contains 202 achievements, and there is 1 DLC pack containing 8 achievements.
Hidden spot 4-2 : Somewhere after Checkpoint 4.
Hidden spot 4-1 : Somewhere after Checkpoint 4.
Hidden spot 3-3 : Somewhere between Checkpoint 3 and Checkpoint 4.
Hidden spot 3-1 : Somewhere between Checkpoint 3 and Checkpoint 4.
Hidden spot 1-8 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-11 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-9 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-4 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-3 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-7 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-5 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 0-1 : Somewhere between the beginning and Checkpoint 1.
Hidden spot 0-3 : Somewhere between the beginning and Checkpoint 1.
P
N
6
Hidden spot 0-4 : Somewhere between the beginning and Checkpoint 1.
Hidden spot 0-2 : Somewhere between the beginning and Checkpoint 1.
Collect 740 hope point in one run.
Collect 720 hope point in one run.
Collect 700 hope point in one run.
Collect 680 hope point in one run.
Hidden spot 3-4 : Somewhere between Checkpoint 3 and Checkpoint 4.
Collect 660 hope point in one run.
Collect 640 hope point in one run.
Hidden spot 3-2 : Somewhere between Checkpoint 3 and Checkpoint 4.
Collect 620 hope point in one run.
Collect 600 hope point in one run.
Collect 580 hope point in one run.
Collect 560 hope point in one run.
Collect 540 hope point in one run.
Collect 520 hope point in one run.
Z
-
Y
X
W
V
U
T
S
R
Q
O
M
L
K
J
I
H
G
F
E
D
C
B
A
9
8
7
5
4
3
2
1
0
Hidden spot 1-12 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-10 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-6 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-2 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 1-1 : Somewhere between Checkpoint 1 and Checkpoint 2.
Hidden spot 0-5 : Somewhere between the beginning and Checkpoint 1.
Collect 500 hope point in one run.
Cross the underground area after falling into stairs hole
Pass challenge number 13
Pass challenge number 12
Pass challenge number 11
Pass challenge number 10
Pass challenge number 9
Pass challenge number 8
Pass challenge number 7
Pass challenge number 6
Pass challenge number 5
Pass challenge number 4
Pass challenge number 3
Pass challenge number 2
Pass challenge number 1
Collect 480 hope point in one run.
Collect 460 hope point in one run.
Collect 440 hope point in one run.
Collect 420 hope point in one run.
Collect 400 hope point in one run.
Collect 380 hope point in one run.
Collect 360 hope point in one run.
Collect 340 hope point in one run.
Collect 320 hope point in one run.
Collect 300 hope point in one run.
Get 225 or more in checkpoint score counter.
Collect 280 hope point in one run.
Collect 260 hope point in one run.
Collect 240 hope point in one run.
Collect 220 hope point in one run.
Collect 200 hope point in one run.
Collect 180 hope point in one run.
Collect 160 hope point in one run.
Get 150 or more in checkpoint score counter.
Collect 140 hope point in one run.
Collect 120 hope point in one run.
Collect 100 hope point in one run.
Collect 80 hope point in one run.
Collect 60 hope point in one run.
Get 75 or more in checkpoint score counter.
Collect 40 hope point in one run.
Collect 20 hope point in one run.
Get 750 or more in checkpoint score counter.
Get 825 or more in checkpoint score counter.
Get 600 or more in checkpoint score counter.
Get 675 or more in checkpoint score counter.
Get 300 or more in checkpoint score counter.
Get 375 or more in checkpoint score counter.
Get 450 or more in checkpoint score counter.
Get 525 or more in checkpoint score counter.