Slightly Bad
Price: Free
Ads: No
In App Purchases: Yes

iOS App Store
Google Play App Store

Temporal Dark PatternsTemporal Dark Patterns

This game has 60 reported Temporal Dark Patterns. There are 70 votes indicating the absence of a dark pattern.


18 votes
2 votes
Daily Rewards -
18 / 2 votes
Encourages return visits every day and punishes you for missing a day.

12 votes
6 votes
Infinite Treadmill -
12 / 6 votes
Impossible to win or complete the game.

11 votes
6 votes
Wait To Play -
11 / 6 votes
In-game timers that make you arbitrarily wait for something.

9 votes
10 votes
Playing by Appointment -
9 / 10 votes
Being forced to play according to the game's schedule instead of yours.

9 votes
8 votes
Grinding -
9 / 8 votes
Being required to perform repetitive and tedious tasks to advance.

1 votes
18 votes
Advertisements -
1 / 18 votes
Forced to watch ads or given rewards for watching ads.

20 votes
Can't Pause or Save -
0 / 20 votes
The game does not allow you to stop playing whenever you want.

Monetary Dark PatternsMonetary Dark Patterns

This game has 117 reported Monetary Dark Patterns. There are 97 votes indicating the absence of a dark pattern.


21 votes
Premium Currency -
21 / 0 votes
Exchange rate between real money and in-game currency disguises the real price of items.

20 votes
1 votes
Artificial Scarcity -
20 / 1 votes
Limited time offers with unnecessary urgency.

20 votes
1 votes
Recurring Fee -
20 / 1 votes
Encourages players to play as much as possible to get their money's worth.

20 votes
1 votes
Gambling / Loot Boxes -
20 / 1 votes
Spending real money to play a game of chance for a reward.

12 votes
4 votes
Pay to Skip -
12 / 4 votes
Spend money to avoid waiting for a timer to expire.

13 votes
8 votes
Pay to Win -
13 / 8 votes
A player can spend real money to purchase something that gives them an advantage in the game.

5 votes
9 votes
Anchoring Tricks -
5 / 9 votes
Placing a cheap item next to an expensive item to make it look more affordable.

4 votes
15 votes
Power Creep -
4 / 15 votes
A permanently purchased item in the game becomes less valuable over time.

2 votes
19 votes
Waste Aversion -
2 / 19 votes
Capped inventory forces you to destroy items or upgrade inventory. Also, having small amounts of left over premium currency.

18 votes
Accidental Purchases -
0 / 18 votes
Making it easy to accidentally spend money with no confirmation or ability to undo or refund the action.

21 votes
Pay Wall -
0 / 21 votes
The game becomes impossible to continue playing without payment.

Social Dark PatternsSocial Dark Patterns

This game has 45 reported Social Dark Patterns. There are 95 votes indicating the absence of a dark pattern.


18 votes
2 votes
Fear of Missing Out -
18 / 2 votes
If you stop playing you'll miss out on something or be left behind and unable to catch up.

18 votes
2 votes
Competition -
18 / 2 votes
The game makes you compete against other players.

4 votes
12 votes
Social Pyramid Scheme -
4 / 12 votes
You get a bonus for inviting your friends and then they have to invite their friends.

3 votes
18 votes
Social Obligation / Guilds -
3 / 18 votes
To avoid letting down your friends, you are obligated to play when you don't want to.

2 votes
19 votes
Reciprocity -
2 / 19 votes
Feeling obligated to return a favor, share resources, trade an item, etc.

21 votes
Friend Spam / Impersonation -
0 / 21 votes
The game sends spam to your contact list or social media account.

21 votes
Encourages Anti-Social Behavior -
0 / 21 votes
The game incentivizes players to lie, cheat, or backstab other players to get ahead.

Psychological Dark PatternsPsychological Dark Patterns

This game has 73 reported Psychological Dark Patterns. There are 57 votes indicating the absence of a dark pattern.


18 votes
3 votes
Invested / Endowed Value -
18 / 3 votes
Having already spent time and money to improve your status in the game, it's difficult to throw it away.

18 votes
2 votes
Badges / Endowed Progress -
18 / 2 votes
Reluctancy to abandon a partially completed goal, even one forced upon the player.

16 votes
4 votes
Variable Rewards -
16 / 4 votes
Unpredictable or random rewards are more addictive than a predictable schedule.

11 votes
6 votes
Aesthetic Manipulations -
11 / 6 votes
Trick questions or toying with emotions or our subconscious desires.

6 votes
11 votes
Complete the Collection -
6 / 11 votes
The urge to collect all the items, achievements or secrets in a game.

2 votes
17 votes
Illusion of Control -
2 / 17 votes
The game cheats or hides information to make you think you're better than you actually are.

2 votes
14 votes
Optimism and Frequency Biases -
2 / 14 votes
Overestimating the frequency of something because we’ve seen it recently or memorably.

App Store Ratings

iOS:  (0.00) with 0 votes.
Google Play:  (4.23) with 7,452 votes.

Recent Dark Pattern Reviews

Illusion of Control reported on Feb 29, 2024
Character cards can have abilities added to them that can either give you more points, give you more health, or ease the timing of notes for the song chart.
Grinding reported on Feb 29, 2024
To get in-game currency and other useful items, you need to do a lot of grinding. Whether that be clearing songs, or, specifically for the currency, ranking up your characters. Ranking up your characters in general is also very grind-heavy.
Advertisements reported on Feb 29, 2024
You can choose to watch advertisements to gain rewards a limited amount of times a day. You will never have an ad forced on you.
Infinite Treadmill reported on Feb 29, 2024
New songs, events, and character cards are regularly added to the game.
Anchoring Tricks reported on Feb 29, 2024
They offer bundles.
Waste Aversion reported on Feb 29, 2024
There is no capped inventory system, however, the options to buy premium currency often mean you have a tiny bit left with nothing you can spend them on, unless you were to buy more premium currency.
Premium Currency reported on Feb 29, 2024
Yes, but for gachas you can only spend a certain amount of paid currency per day, whereas earned currency doesn't have this limit. However, there are other things that you can only get via paid currency, but these are never anything essential. Usually just cosmetics.
Artificial Scarcity reported on Feb 29, 2024
There are often limited time gachas, although often times they do get reruns in the future. Additionally, in the store, they have limited time outfits.
Recurring Fee reported on Feb 29, 2024
Optional subscription of multiple paid tiers.
Gambling / Loot Boxes reported on Feb 29, 2024
Yes, but you can only spend a limited amount of bought currency per day on gachas, when this limit doesn't exist for earned currency.

Report a Dark Pattern

Screenshot The best Music Game experience at your fingertips with the latest Hatsune Miku adventure!
Tap to the rhythm of popular songs and collect character cards to customise your own band!

Find your true feelings! A mysterious song named “Untitled” with no melody or lyrics is passed around amongst the youth in Shibuya, Tokyo. This song unlocks access to “SEKAI” a strange place that allows everyone to discover their true emotions and their own song.
Play with Hatsune Miku and her Virtual Friends, as well as an original cast of 20 characters overcoming their struggles through the power of music.

• Tap, hold, and flick to the rhythm!
• Discover a rich cast of characters with fully voiced Story Chapters.
• Easy to Master: 5 difficulty levels to choose from.
• Play on your own or create a room with up to 4 friends to share the fun.
• Collect character cards and customize your band and music videos. Level up and upgrade your characters to unlock more skills and reach higher scores.
• Enjoy Virtual Show, a virtual concert in the comfort of your own home, with players from all over the world! Customize your Avatar and Glow Sticks for the show.
• Dress your band members with a wide variety of costumes that you can craft!

ROKI (Lyrics: mikitoP, Music: mikitoP)
Tell Your World (Lyrics: kz, Music: kz)
BRING IT ON (Lyrics: Reol, Music: Giga)
Happy Synthesizer (Lyrics: EasyPop, Music: EasyPop)
Melt (Lyrics: ryo, Music: ryo)
Charles (Lyrics: balloon, Music: balloon)
and much more!

Enjoy online performances in real time of your favorite in-game band with players from all over the world!
Join virtual shows and chat with the community. Interact with the stage by displaying emotes and special effects to make the performamce even more stunning!

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iPhone 7 or above