Here is the full list of all 201 Oik achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Complete level S!
Open level S
Level S
Complete level R!
Open level R
Level R
Complete level Q!
Open level Q
Level Q
Complete level P!
Open level P
Level P
Complete level O!
Open level O
Level O
Complete level N!
Level N
Open level N
Complete level M!
Open level M
Level M
Complete level L!
Level L
Open level L
Complete level K!
Open level K
Level K
Complete level J!
Level J
Open level J
Complete level I!
Open level I
Level I
Complete level H!
Open level H
Level H
Complete level G!
Open level G
Level G
Complete level F!
Open level F
Level F
Complete level E!
Open level E
Level E
Complete level D!
Open level D
Level D
Complete level С!
Open level C
Level С
Complete level B!
Open level B
Level B
Complete level A!
Open level A
Level A
Open level T
Level T
Complete level T!
Open level U
Level U
Complete level U!
Open level V
Level V
Complete level V!
Open level W
Level W
Complete level W!
Open level X
Level X
Complete level X!
Open level Y
Level Y
Complete level Y!
Open level Z
Level Z
Complete level Z!
Open level 苟
Level 苟
Complete level 苟!
Open level 利
Level 利
Complete level 利!
Open level 国
Level 国
Complete level 国!
Open level 家
Level 家
Complete level 家!
Open level 生
Level 生
Complete level 生!
Open level 死
Level 死
Complete level 死!
Open level 以
Level 以
Complete level 以!
Open level 岂
Level 岂
Complete level 岂!
Open level 因
Level 因
Complete level 因!
Open level 福
Level 福
Complete level 福!
Open level 趋
Level 趋
Complete level 趋!
Open level 避
Level 避
Complete level 避!
Open level 之
Level 之
Complete level 之!
Open level 1
Level 1
Complete level 1!
Open level 2
Level 2
Complete level 2!
Open level 3
Level 3
Complete level 3!
Open level 4
Level 4
Complete level 4!
Open level 5
Level 5
Complete level 5!
Open level 6
Level 6
Complete level 6!
Open level 7
Level 7
Complete level 7!
Open level 8
Level 8
Complete level 8!
Open level 9
Level 9
Complete level 9!
Open level 0
Level 0
Complete level 0!
Open level <
Level <
Complete level
Open level >
Level >
Complete level >!
Open level !
Level !
Complete level !!
Open level ?
Level ?
Complete level ?!
Open level $
Level $
Complete level $!
Open level +
Level +
Complete level +!
Open level -
Level -
Complete level -!
Open level =
Level =
Complete level =!
Open level :
Level :
Complete level :!
Open level [
Level [
Complete level [!
Open level ]
Level ]
Complete level ]!
Open level Window
Level Window
Complete level Window!
Open level Ball
Level Ball
Complete level Ball!
Open level USSR
Level USSR
Complete level USSR!
Open level Heart
Level Heart
Complete level Heart!
Open level Checkmark
Level Checkmark
Complete level Checkmark!
Pass game!