William and Sly

Share Collapse


Log in to save your medals! Don't have an account? Create one for free!

Flight 5 Points

Find the wings.

Weather Mage 5 Points

Turn off the rain.

Dominus Lux 10 Points

Slay five darklings.

Deviation 25 Points

Unlock all boxes and switches.

Resolution 25 Points

Complete the game.

Sensitive Nose 50 Points

Find all of the mushrooms.

Sly Fox 100 Points

Earn more than 35,000 points.

Author Comments

JAN 30, 2016
Hey guys, I’ve started work on a possible William and Sly 3. Follow me on facebook for updates! https://www.facebook.com/LucasPaakh/


This is probably my best game to date. I wanted to make something more accessible, as most of my flash games have been too complicated for my family to play. :3

I really hope you guys enjoy it, I think it's the most effort I've put in to anything. A big thanks to everyone who helped me test, and Tom and NG for the sponsorship!

As always, leave a comment! I love reading them.

EDIT: The game has version detection, but YOU NEED FLASH 10 to play it. If you have trouble loading the game, please send me a PM with the details.

EDIT: Because nearly everyone is saying they can't figure out the boss's pattern, I've made a slight change that should make it more obvious. Once the game update is approved I'll let you guys know and you can try again with the new pattern. *Alright it's up now*

If you're getting a black screen after the Newgrounds and Particlasm screens this applies to you. This might also help with the loading bar freezing. This was posted by a Kongregate user (thanks Knork):

"If the game does not load past the ads make sure that ngads.com and ads.newgrounds.com are not being blocked in your hosts file. Which is located under C:\WINDOWS\system32\drive rs\etc
If they are, uncheck the "Read-only" attribute and edit out those two lines."

If this works for you let me know.

Log in / sign up to vote & review!

Newgrounds accounts are free and registered users see fewer ads!

When i first started playing i thought it was going to be bad but i enjoyed it

Kajenx responds:

me irl

Very fun game. Love the atmosphere and the music.

its been 9 years playing this..feeling for this game but i love it

Kajenx responds:

I wrote a book with William and Sly in it! It's gonna come out later this year. :)

I found this game on another site years ago and loved it but never got to finish it. I so glad I found it again!
Can't wait to unlock everything. :D

Kajenx responds:

There's a second one too. :)

This is a very beautiful and relaxing game. the rain is a wonderful touch as well. it's easy to get lost in the game and I can play it and find it challenging, yet relaxing at the same time. It's clear that you put a lot of thought and consideration into the development of William and Sly. I've always loved MetroidVania games, and it's interesting that you successfully made a PHENOMENAL one, yet you toned it down from what the norm for MetroidVania games is. (the genre should be called MetroidVania and Sly games at this rate. ;) ) I've loved this game for a long time, and I still remember the first time I played it. I was I think was 12 or 13. I used to be terrible at this and I didn't fully grasp the intricate hidden tunnels, but now that I'm a few years older, it makes sense, and it's just calming to me. thank you so much for this beautiful game. :)

Kajenx responds:

Thanks mang. :)

Credits & Info

4.60 / 5.00

Jul 17, 2009
3:03 PM EDT
Action - Platformer - Other
  • Frontpaged July 17, 2009
  • Daily Feature July 17, 2009
  • Weekly 2nd Place July 21, 2009