# Left 4 Dead 2

> Indie game profile, served by indielist (https://indielist.games). Sales estimate uses the white-box Boxleiter algorithm; numbers are approximate (±50%).

## Snapshot
- **Primary genre**: Action
- **Release year**: 2009
- **Release date**: Nov 16, 2009
- **Platforms**: linux, windows
- **Genres**: Action
- **Launch price**: $9.99 USD
- **Steam reviews**: 798,033
- **Positive review %**: 98%
- **Steam app**: https://store.steampowered.com/app/550

## Developer
- **Studio**: [Valve](https://indielist.games/studios/valve)

## Publisher
- **Name**: [Valve](https://indielist.games/publishers/valve)

## Sales estimate (white-box, version v1.0)

- **Units (median)**: 67,832,805 (range 40,699,683 – 94,965,927)
- **Net revenue (median)**: $387,073,521 USD
- **Boxleiter NB used**: 85
- **Algorithm version**: v1.0

### NB breakdown
- `base`: +50
- `year_2009`: +30
- `price_$10`: -5
- `positive_98%`: +10

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Source: indielist (https://indielist.games/games/left-4-dead-2-550)
Estimates are not official sales data. Methodology: docs/sales-algorithm.md. Always verify large numbers with official sources before citing.