The Game Census
The Legend of Bum-Bo cover art

The Legend of Bum-Bo

Edmund McMillen · 2019-11-12

SteamGOGPlayStation StoreEpic Games StoreMicrosoft Store

AdventureIndieStrategy

Modes: Single player

Releases: TBD (iOS), Jun 29, 2022 (Nintendo Switch), Nov 12, 2019 (PC (Microsoft Windows)), Jun 29, 2022 (PlayStation 5), Jun 29, 2022 (Xbox Series X|S)

A puzzle based deck building rogue-like prequel to The Binding of Isaac... Made of cardboard!

10
playing now
81%
positive of 5.9k reviews
Very Positive
steam rating
1,000,000–2,000,000
owners (SteamSpy est.)
72/100
critic score (1 outlets, IGDB)
60/100
IGDB user rating (12 ratings)
gold
deck/linux tier (ProtonDB)
$14.99
steam price (US)

10 players in-game as of 2026-08-30 17:00 UTC (census sample)

The Legend of Bum-bo is a 2019 roguelike deck-building game developed by designer Edmund McMillen and programmer James Interactive. The game was released for Microsoft Windows via Steam in November 2019 and Android by The Label in December 2020, and for Nintendo Switch, PlayStation 5, Xbox Series X/S by Nicalis in June 2022. The game is a prequel to McMillen's previous roguelike video game The Binding of Isaac.

Health check

Quietly active
  • · 10 players in-game at the last census sample.
  • · 108 reviews in the last 8 weeks (~14/week).
  • · Review velocity down 4% vs the prior 8 weeks.
  • · Current weekly pace is under 5% of the all-time peak week (3,316 reviews).
  • · Top 11% of 11,362 Adventure games in the census by review count.

Health tier since 2026-08-30

Estimated sales: 148k–356k copies

Review-multiple estimate from 5,935 total reviews — how this is computed.

Current store prices

GOG$14.99
Microsoft Store$19.99

Deal snapshots via CheapShark, refreshed daily.

All-time low: $2.99 at GOG (2023-12-13)via IsThereAnyDeal

12-month high $14.99 · on sale 4 of 9 observed days · $12.00 above the all-time low (census price snapshots)

Review momentum

PositiveNegative
2.8k2.8k20192026Week of 2019-11-01: 2,780 positiveWeek of 2019-11-01: 536 negativeWeek of 2019-12-01: 480 positiveWeek of 2019-12-01: 73 negativeWeek of 2020-01-01: 102 positiveWeek of 2020-01-01: 31 negativeWeek of 2020-02-01: 44 positiveWeek of 2020-02-01: 14 negativeWeek of 2020-03-01: 56 positiveWeek of 2020-03-01: 31 negativeWeek of 2020-04-01: 44 positiveWeek of 2020-04-01: 25 negativeWeek of 2020-05-01: 29 positiveWeek of 2020-05-01: 17 negativeWeek of 2020-06-01: 28 positiveWeek of 2020-06-01: 17 negativeWeek of 2020-07-01: 50 positiveWeek of 2020-07-01: 25 negativeWeek of 2020-08-01: 32 positiveWeek of 2020-08-01: 11 negativeWeek of 2020-09-01: 14 positiveWeek of 2020-09-01: 15 negativeWeek of 2020-10-01: 16 positiveWeek of 2020-10-01: 19 negativeWeek of 2020-11-01: 23 positiveWeek of 2020-11-01: 15 negativeWeek of 2020-12-01: 16 positiveWeek of 2020-12-01: 8 negativeWeek of 2021-01-01: 44 positiveWeek of 2021-01-01: 25 negativeWeek of 2021-02-01: 33 positiveWeek of 2021-02-01: 11 negativeWeek of 2021-03-01: 109 positiveWeek of 2021-03-01: 35 negativeWeek of 2021-04-01: 29 positiveWeek of 2021-04-01: 3 negativeWeek of 2021-05-01: 32 positiveWeek of 2021-05-01: 4 negativeWeek of 2021-06-01: 21 positiveWeek of 2021-06-01: 5 negativeWeek of 2021-07-01: 22 positiveWeek of 2021-07-01: 5 negativeWeek of 2021-08-01: 21 positiveWeek of 2021-08-01: 1 negativeWeek of 2021-09-01: 16 positiveWeek of 2021-09-01: 2 negativeWeek of 2021-10-01: 15 positiveWeek of 2021-10-01: 4 negativeWeek of 2021-11-01: 25 positiveWeek of 2021-11-01: 7 negativeWeek of 2021-12-01: 18 positiveWeek of 2021-12-01: 2 negativeWeek of 2022-01-01: 17 positiveWeek of 2022-01-01: 9 negativeWeek of 2022-02-01: 16 positiveWeek of 2022-02-01: 2 negativeWeek of 2022-03-01: 37 positiveWeek of 2022-03-01: 11 negativeWeek of 2022-04-01: 22 positiveWeek of 2022-04-01: 5 negativeWeek of 2022-05-01: 22 positiveWeek of 2022-05-01: 3 negativeWeek of 2022-06-01: 20 positiveWeek of 2022-06-01: 5 negativeWeek of 2022-07-01: 20 positiveWeek of 2022-07-01: 4 negativeWeek of 2022-08-01: 19 positiveWeek of 2022-08-01: 3 negativeWeek of 2022-09-01: 11 positiveWeek of 2022-09-01: 3 negativeWeek of 2022-10-01: 8 positiveWeek of 2022-10-01: 5 negativeWeek of 2022-11-01: 11 positiveWeek of 2022-11-01: 1 negativeWeek of 2022-12-01: 8 positiveWeek of 2022-12-01: 2 negativeWeek of 2023-01-01: 15 positiveWeek of 2023-01-01: 3 negativeWeek of 2023-02-01: 14 positiveWeek of 2023-02-01: 3 negativeWeek of 2023-03-01: 11 positiveWeek of 2023-03-01: 3 negativeWeek of 2023-04-01: 14 positiveWeek of 2023-04-01: 3 negativeWeek of 2023-05-01: 9 positiveWeek of 2023-05-01: 2 negativeWeek of 2023-06-01: 14 positiveWeek of 2023-06-01: 3 negativeWeek of 2023-07-01: 26 positiveWeek of 2023-07-01: 8 negativeWeek of 2023-08-01: 16 positiveWeek of 2023-08-01: 5 negativeWeek of 2023-09-01: 11 positiveWeek of 2023-09-01: 1 negativeWeek of 2023-10-01: 11 positiveWeek of 2023-10-01: 5 negativeWeek of 2023-11-01: 9 positiveWeek of 2023-11-01: 5 negativeWeek of 2023-12-01: 10 positiveWeek of 2024-01-01: 8 positiveWeek of 2024-01-01: 4 negativeWeek of 2024-02-01: 13 positiveWeek of 2024-02-01: 3 negativeWeek of 2024-03-01: 18 positiveWeek of 2024-03-01: 5 negativeWeek of 2024-04-01: 11 positiveWeek of 2024-04-01: 5 negativeWeek of 2024-05-01: 13 positiveWeek of 2024-05-01: 4 negativeWeek of 2024-06-01: 18 positiveWeek of 2024-06-01: 2 negativeWeek of 2024-07-01: 22 positiveWeek of 2024-07-01: 4 negativeWeek of 2024-08-01: 8 positiveWeek of 2024-08-01: 1 negativeWeek of 2024-09-01: 13 positiveWeek of 2024-09-01: 1 negativeWeek of 2024-10-01: 13 positiveWeek of 2024-10-01: 2 negativeWeek of 2024-11-01: 11 positiveWeek of 2024-11-01: 6 negativeWeek of 2024-12-01: 13 positiveWeek of 2024-12-01: 11 negativeWeek of 2025-01-01: 20 positiveWeek of 2025-01-01: 7 negativeWeek of 2025-02-01: 9 positiveWeek of 2025-02-01: 2 negativeWeek of 2025-03-01: 11 positiveWeek of 2025-03-01: 7 negativeWeek of 2025-04-01: 9 positiveWeek of 2025-04-01: 2 negativeWeek of 2025-05-01: 5 positiveWeek of 2025-05-01: 4 negativeWeek of 2025-06-01: 9 positiveWeek of 2025-06-01: 3 negativeWeek of 2025-07-01: 13 positiveWeek of 2025-07-01: 4 negativeWeek of 2025-08-01: 7 positiveWeek of 2025-08-01: 3 negativeWeek of 2025-09-01: 15 positiveWeek of 2025-09-01: 3 negativeWeek of 2025-10-01: 18 positiveWeek of 2025-10-01: 9 negativeWeek of 2025-11-01: 5 positiveWeek of 2025-11-01: 3 negativeWeek of 2025-12-01: 11 positiveWeek of 2025-12-01: 4 negativeWeek of 2026-01-01: 14 positiveWeek of 2026-01-01: 7 negativeWeek of 2026-02-01: 7 positiveWeek of 2026-02-01: 3 negativeWeek of 2026-03-01: 8 positiveWeek of 2026-03-01: 2 negativeWeek of 2026-04-01: 7 positiveWeek of 2026-04-01: 2 negativeWeek of 2026-05-01: 7 positiveWeek of 2026-05-01: 3 negativeWeek of 2026-06-01: 8 positiveWeek of 2026-06-01: 5 negativeWeek of 2026-07-01: 12 positiveWeek of 2026-07-01: 8 negativeWeek of 2026-08-01: 6 positiveWeek of 2026-08-01: 6 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

1722026-08-06 21:00 — 10 players2026-08-07 05:00 — 5 players2026-08-07 13:00 — 9 players2026-08-07 21:00 — 13 players2026-08-08 05:00 — 7 players2026-08-08 13:00 — 11 players2026-08-08 21:00 — 16 players2026-08-09 05:00 — 9 players2026-08-09 13:00 — 12 players2026-08-09 21:00 — 12 players2026-08-10 05:00 — 10 players2026-08-10 14:00 — 13 players2026-08-10 22:00 — 14 players2026-08-11 06:00 — 8 players2026-08-11 14:00 — 7 players2026-08-12 21:00 — 15 players2026-08-14 05:00 — 9 players2026-08-15 13:00 — 7 players2026-08-16 21:00 — 17 players2026-08-18 04:00 — 12 players2026-08-19 12:00 — 15 players2026-08-20 19:00 — 15 players2026-08-22 03:00 — 15 players2026-08-23 10:00 — 9 players2026-08-24 18:00 — 11 players2026-08-26 02:00 — 9 players2026-08-27 10:00 — 6 players2026-08-28 17:00 — 7 players2026-08-30 01:00 — 6 players2026-08-30 17:00 — 10 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$14.99$2.992019-11-062026-08-302019-11-06 — best price $12.742019-11-19 — best price $14.992019-12-19 — best price $10.492020-06-25 — best price $7.492021-01-21 — best price $7.492021-02-11 — best price $7.492021-03-05 — best price $7.492021-10-21 — best price $7.492021-10-28 — best price $7.492021-11-24 — best price $7.492021-12-22 — best price $7.492022-02-04 — best price $14.992022-03-21 — best price $5.242022-04-04 — best price $14.992022-06-06 — best price $11.992022-06-27 — best price $14.992022-07-07 — best price $14.992022-07-28 — best price $14.992022-10-27 — best price $11.992022-11-04 — best price $14.992022-11-28 — best price $14.992023-06-19 — best price $10.042023-07-13 — best price $14.992024-01-05 — best price $14.992024-03-02 — best price $14.992024-03-21 — best price $14.992024-05-10 — best price $14.992024-07-11 — best price $14.992024-11-18 — best price $14.992024-12-04 — best price $14.992024-12-19 — best price $4.642025-01-03 — best price $14.992025-03-08 — best price $14.992025-04-03 — best price $14.992025-07-10 — best price $14.992025-10-06 — best price $14.992025-12-19 — best price $4.942026-01-05 — best price $14.992026-07-09 — best price $14.992026-08-30 — best price $14.99
Lowest recorded price across tracked stores, per day (census snapshots).

Attention

742352026-06-01 — 80 pageviews2026-06-04 — 54 pageviews2026-06-07 — 61 pageviews2026-06-10 — 41 pageviews2026-06-13 — 42 pageviews2026-06-16 — 41 pageviews2026-06-19 — 35 pageviews2026-06-22 — 61 pageviews2026-06-25 — 81 pageviews2026-06-28 — 130 pageviews2026-07-01 — 117 pageviews2026-07-04 — 109 pageviews2026-07-07 — 139 pageviews2026-07-10 — 106 pageviews2026-07-13 — 109 pageviews2026-07-16 — 79 pageviews2026-07-19 — 101 pageviews2026-07-22 — 85 pageviews2026-07-25 — 80 pageviews2026-07-28 — 90 pageviews2026-07-31 — 73 pageviews2026-08-03 — 85 pageviews2026-08-06 — 91 pageviews2026-08-09 — 742 pageviews2026-08-12 — 96 pageviews2026-08-15 — 108 pageviews2026-08-18 — 96 pageviews2026-08-21 — 82 pageviews2026-08-24 — 110 pageviews2026-08-27 — 90 pageviews2026-08-29 — 87 pageviews
Daily Wikipedia pageviews (attention proxy, census-recorded).

Completion

48
achievements tracked
73.8%
earned "The Forlorn Hollow"
14.4%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsSingle-playerSteam AchievementsFamily Sharing

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)5,7425%48
PS5 (PlayStation)2904%49
Xbox Series (Xbox)1150%48
Switch (Nintendo)100%0
Switch (Nintendo)10%0

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Player tags

FunnyIndieCasualPuzzleMatch 3StrategyAdventureCard GameDifficultRogue-lite

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

Star Control®: OriginsSurvivalistReverse CrawlForgotton AnneForce of NatureDungeon Of Dragon KnightCHANGE: A Homeless Survival ExperienceTorchlight III

Similarity via IGDB.

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