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William and Sly: Classic Collection

William and Sly: Classic Collection

The world of William and Sly is yours to explore, seeking out collectables and secrets, while soaking in the tranquil visuals and melancholic soundtrack. In this pair of classic Flash games, you play as a fox, running and leaping through an atmospheric ecosystem entirely at your own pace.

Released Dec 1, 2023 Developer Lucas Paakh Publisher 2 Left Thumbs Platforms Windows · Mac 2D PlatformerExplorationOpen WorldNatureRelaxing
View on Steam ↗ Free (US · as of 2026-09-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.

96.2%positive236 reviews
Recommended · 0 found this helpful

“This is a very cute game about a fox! It was very fun and creative; I really enjoyed the 2d open world aspect.”

— a player, Steam review · 5 hrs played
Recommended · 0 found this helpful

“The William and Sly games are among the best of the best from the golden age of Flash gaming. They're simple, engaging, and extremely atmospheric. The gameplay and aesthetics inspire a natural urge to explore, without making the player feel frustrated or lost. They're true…”

— a player, Steam review · 5 hrs played
Recommended · 0 found this helpful

“So much nostalgia, god this game was and still is a breath of fresh air and a excellent decompressor.”

— a player, Steam review · 2 hrs played
Read more reviews ↗

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.

14achievements
32.3%median completion
7.2%rarest: Sly Fox
48.3% of players 43.0% of players 39.7% of players 39.0% of players 38.9% of players 36.7% of players 33.9% of players 32.3% of players 28.0% of players 25.1% of players 15.3% of players 11.6% of players 8.5% of players 7.2% of players 48.3% 0% most earned rarest
Almost everyone has
48.3%Firefox — (W&S 2) Flame away
43.0%Studious — (W&S 2) Find 5 journal pages
39.7%Disillusioned — (W&S 2) Find 50 mushrooms
Rarest badges of honor
7.2%Sly Fox — (W&S 1) Earn more than 35,000 points
8.5%Sensitive Nose — (W&S 1) Find all the mushrooms
11.6%Deviation — (W&S 1) Unlock all boxes and switches

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Feb 07, 2026
2026 Publisher Sale

Today kicks off the big 2 Left Thumbs Publisher Sale ! Explore the full event page to scope out loads of discounts, free games, bundles and more! NEW RELEASE Yesterday saw the release of Underboard ,

Feb 07, 2025
2025 Publisher Sale

Today kicks off the big 2 Left Thumbs Publisher Sale ! Explore the full event page to scope out loads of discounts, free games, bundles and more! How about a FREE game?! Croak Crusader: Spawn of the S

Feb 26, 2024
William and Sly 🦊 OUT NOW!!

WILLIAM AND SLY ARE BACK The hit Flash series, William and Sly , is returning as a 3d platforming adventure! Explore an expansive wilderness landscape as a fox in search of mushrooms, and untangle the

Jan 22, 2024
Now Available: The Everloom

The Everloom With the help of Antony Lavelle (The-EXP), we have added The Everloom as a free update to this Classic Collection. This is a relaxing pixel art adventure. Explore the environment, talk to

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-09-26.

GenresAdventure, Casual, Free To Play
Player tags2D Platformer · Exploration · Open World · Nature · Relaxing · Foxes · Cozy · Collectathon · Metroidvania · Hand-drawn · Atmospheric · Adventure (Steam store community voting)
FeaturesSingle-player · Steam Achievements · Partial Controller Support · Family Sharing
LanguagesEnglish
Achievements14
Minimum system requirements (PC)

Minimum: OS *: Windows 7 Processor: Dual Core i5 Memory: 4 GB RAM Storage: 200 MB available space