| App ID | 2843130 |
| App Type | Game |
| Store Name | Promise with My Sister |
| Developer | Carnival Pepper |
| Publisher | Carnival Pepper |
| Supported Systems | Windows macOS |
| Technologies | Unity Engine |
| Last Changenumber | 31104354 |
| Last Record Update | 14 September 2025 – 16:28:04 UTC ( |
| Release Date | 10 May 2024 – 04:01:09 UTC ( |
A story centered around sisters, and as their brother, I must protect them. My mission is to find and reclaim the memories of time spent with my sisters. Numerous adventures filled with challenges are just beginning. This is my very own RPG life!
Steam price history
Current Price
$8.99
Lowest Recorded Price
$2.69 at -70%
26 June 2025
| Currency | Current Price | Converted Price | Lowest Recorded Price | ||
|---|---|---|---|---|---|
 U.S. Dollar |
$8.99 | $8.99 | $2.69 | $2.69 at -70% | |
 Russian Ruble |
350 ₽ | $4.33 | -51.82% | $1.29 | 105 ₽ at -70% |
 Chinese Yuan |
¥ 32 | $4.49 | -50.00% | $1.34 | ¥ 9.60 at -70% |
 Taiwan Dollar |
NT$ 150 | $4.87 | -45.72% | $1.46 | NT$ 45 at -70% |
 Vietnamese Dong |
129000₫ | $4.90 | -45.47% | $1.46 | 38500₫ at -70% |
 Kazakhstani Tenge |
2600₸ | $4.90 | -45.43% | $1.47 | 780₸ at -70% |
 Ukrainian Hryvnia |
206₴ | $4.91 | -45.38% | $1.45 | 61₴ at -70% |
 Indonesian Rupiah |
Rp 82499 | $4.95 | -44.92% | $1.48 | Rp 24749 at -70% |
 LATAM - U.S. Dollar |
$4.99 | $4.99 | -44.49% | $1.49 | $1.49 at -70% |
 MENA - U.S. Dollar |
$4.99 | $4.99 | -44.49% | $1.49 | $1.49 at -70% |
 South Asia - USD |
$4.99 | $4.99 | -44.49% | $1.49 | $1.49 at -70% |
 Indian Rupee |
₹ 450 | $5.07 | -43.60% | $1.52 | ₹ 135 at -70% |
 Philippine Peso |
₱304.95 | $5.19 | -42.22% | $1.55 | ₱91.48 at -70% |
 South African Rand |
R 91.00 | $5.24 | -41.71% | $1.57 | R 27.30 at -70% |
 Saudi Riyal |
20.50 SR | $5.46 | -39.20% | $1.63 | 6.15 SR at -70% |
 Chilean Peso |
CLP$ 5200 | $5.52 | -38.60% | $1.65 | CLP$ 1560 at -70% |
 Brazilian Real |
R$ 29,99 | $5.57 | -38.00% | $1.67 | R$ 8,99 at -70% |
 CIS - U.S. Dollar |
$5.79 | $5.79 | -35.60% | $1.73 | $1.73 at -70% |
 Malaysian Ringgit |
RM24.50 | $5.85 | -34.93% | $1.75 | RM7.35 at -70% |
 Kuwaiti Dinar |
1.85 KD | $6.02 | -32.96% | $1.79 | 0.55 KD at -70% |
 Qatari Riyal |
21.99 QR | $6.02 | -32.96% | $1.80 | 6.59 QR at -70% |
 Mexican Peso |
Mex$ 112.99 | $6.08 | -32.31% | $1.82 | Mex$ 33.89 at -70% |
 Colombian Peso |
COL$ 23500 | $6.09 | -32.23% | $1.82 | COL$ 7050 at -70% |
 Thai Baht |
฿199.00 | $6.15 | -31.56% | $1.84 | ฿59.70 at -70% |
 Peruvian Sol |
S/.21.00 | $6.20 | -31.02% | $1.86 | S/.6.30 at -70% |
 Hong Kong Dollar |
HK$ 50.00 | $6.43 | -28.43% | $1.93 | HK$ 15.00 at -70% |
 Japanese Yen |
¥ 1000 | $6.49 | -27.81% | $1.94 | ¥ 300 at -70% |
 Singapore Dollar |
S$9.00 | $6.91 | -23.09% | $2.07 | S$2.70 at -70% |
 South Korean Won |
₩ 9900 | $6.92 | -22.94% | $2.07 | ₩ 2970 at -70% |
 Uruguayan Peso |
$U279 | $7.00 | -22.13% | $2.08 | $U83 at -70% |
 U.A.E. Dirham |
26.00 AED | $7.07 | -21.25% | $2.12 | 7.80 AED at -70% |
 New Zealand Dollar |
NZ$ 13.25 | $7.58 | -15.62% | $2.27 | NZ$ 3.97 at -70% |
 Costa Rican Colon |
₡4200 | $8.36 | -6.94% | $2.50 | ₡1260 at -70% |
 Canadian Dollar |
CDN$ 11.79 | $8.40 | -6.49% | $2.51 | CDN$ 3.53 at -70% |
 Australian Dollar |
A$ 13.19 | $8.63 | -3.95% | $2.58 | A$ 3.95 at -70% |
 Norwegian Krone |
99,00 kr | $9.81 | +9.16% | $2.94 | 29,70 kr at -70% |
 British Pound |
£7.49 | $9.82 | +9.26% | $2.93 | £2.24 at -70% |
 Israeli New Shekel |
₪32.95 | $10.14 | +12.80% | $3.04 | ₪9.88 at -70% |
 Euro |
8,79€ | $10.14 | +12.83% | $3.03 | 2,63€ at -70% |
 Polish Zloty |
40,99zł | $11.11 | +23.59% | $3.33 | 12,29zł at -70% |
 Swiss Franc |
CHF 9.99 | $12.42 | +38.17% | $3.71 | CHF 2.99 at -70% |
Valve suggested prices are shown on package pages.
Price history
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Additional Information
| Developer | Carnival Pepper | |||||||||||||||||
| ReleaseState | released | |||||||||||||||||
| Publisher | Carnival Pepper | |||||||||||||||||
| Store Release Date | 10 May 2024 – 04:01:14 UTC ( |
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| osarch | empty string | |||||||||||||||||
| community_hub_visible | Yes | |||||||||||||||||
| Primary Genre | RPG (3) | |||||||||||||||||
| Store Genres | Casual (4), Indie (23), RPG (3), Strategy (2) | |||||||||||||||||
| Steam Release Date | 10 May 2024 – 04:01:09 UTC ( |
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| Store Asset Modification Time | 29 February 2024 – 06:16:49 UTC ( |
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| library_assets |
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| osextended | empty string | |||||||||||||||||
| name_localized |
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| review_score | 7 | |||||||||||||||||
| review_percentage | 90 | |||||||||||||||||
| Detected Technologies (?) | Unity Engine, UnityBurst SDK, UnityIL2CPP SDK, cURL SDK | |||||||||||||||||
| controllertagwizard | Yes | |||||||||||||||||
| AI Content Type | 2 | |||||||||||||||||
| First seen on SteamDB | 15 February 2024 – 08:52:37 UTC ( |
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Supported Languages
| 4 Languages | Interface | Full Audio | Subtitles |
|---|---|---|---|
| Japanese | Yes | Yes | Yes |
| Simplified Chinese | Yes | Yes | |
| Traditional Chinese | Yes | Yes | |
| English | Yes | Yes |
Assets
Load all asset images
| trailer_name | Imoto Yakusooku PV |
| trailer_category | 1 |
| trailer_480p ↴ | |
| video/webm | 257003960/movie480_vp9.webm |
| video/mp4 | 257003960/movie480.mp4 |
| trailer_max ↴ | |
| video/webm | 257003960/movie_max_vp9.webm |
| video/mp4 | 257003960/movie_max.mp4 |
| microtrailer ↴ | |
| video/webm | 257003960/microtrailer.webm |
| video/mp4 | 257003960/microtrailer.mp4 |
| screenshot_medium | 257003960/movie.293x165.jpg |
| screenshot_full | 257003960/movie_full.jpg |
| all_ages | true |
| is_highlight | true |
| timestamp | 2 March 2024 – 12:05:01 UTC |
