How many songs are in the album "《Underunknown》 OST" by JS小僵尸?

There are a total of 19 songs in "《Underunknown》 OST".

When was the album "《Underunknown》 OST" by JS小僵尸 released?

"《Underunknown》 OST" was released on March 26, 2025.

#	Track	Artist	Key	Camelot	BPM
1	Main menu：Sin hunter	JS小僵尸	D♭ Major	3B	118
2	Chapter 1：Resist foreign invasion	JS小僵尸	B♭ Minor	3A	161
3	Boss 1：Lemuria Commander	JS小僵尸	B♭ Minor	3A	161
4	Chapter 2：Intelligent mechanical crisis	JS小僵尸	B♭ Minor	3A	161
5	Boss 2：Sky-Eye #XXXIV	JS小僵尸	B♭ Minor	3A	161
6	Hidden Chapter：The 3.5 dimension	JS小僵尸	B♭ Minor	3A	161
7	Hidden Boss：Lairdom	JS小僵尸	B♭ Minor	3A	161
8	Final Chapter：Unexpected guest	JS小僵尸	A Major	11B	173
9	Final Boss：Destiny, Stage 1	JS小僵尸	B♭ Minor	3A	161
10	Final Boss：Destiny, Stage 2	JS小僵尸	A Major	11B	173
11	Bad Ending：Rout	JS小僵尸	B♭ Minor	3A	161
12	Bad Ending：Numb	JS小僵尸	D♭ Major	3B	118
13	Good Ending：Triumphant return	JS小僵尸	B♭ Minor	3A	161
14	Good Ending：Last humanity	JS小僵尸	A Major	11B	173
15	？Ending：Worth or not	JS小僵尸	A Major	11B	173
16	Bad Ending：Become history	JS小僵尸	B♭ Minor	3A	161
17	Good Ending：Rewrite history	JS小僵尸	F Minor	4A	88
18	Hidden Ending：Create history	JS小僵尸	F Minor	4A	88
19	Nightmare training challenge	JS小僵尸	B♭ Minor	3A	161