Huge list of Unity games.

Today I'm sharing some websites to download Unity games.
Filter the results with .unity3d.
Nethry
85Play
Martian Games
Y8 (First server)
Y8 (Second server)
Y8 (Third server) (Results do not need to be filtered for this one.)
Pacogames (Results do not need to be filtered for this one.)
That's pretty much it. There are, of course, more websites, but these are more than enough, given the fact they have thousands of games.

Leave a comment if you have suggestions and I may add them to this post.

Shubus Viewer

Shubus Viewer is a unique-of-its-kind utility which allows creation of texts and HTML pages, view pictures, play games and more! Shubus Viewer represents Shubus Corporation's point of view: how user-friendly an application should actually be like. The major features of Shubus Viewer are:

• Integration with web-browser and Google search;
• Integration with e-mail client;
• Support for Flash games (.swf files), Unity games (.unity3d files), Adobe Shockwave games (.dcr files);
• User preferred files;
• List management;
• Base64 decoding and URL decoding features will help you to decode encoded URLs;
• Base64 encoding and URL encoding features will help you to encode your data;
• Automatic tabulation;
• Moving selected text blocks is easy with arrow keys;
• Ability to select the encoding for reading and saving text;
• Ability to preview text before saving with selected encoding;
• Automatic detection of RTL languages: Arabic, Urdu, Hebrew, Syriac, Thaana;
• Transform the interface to display correctly in Arabic, Urdu, Hebrew, Syriac, Thaana languages;
• View HTML and MHT files;
• View pictures.

The list is not limited to this, but many others useful features are present in Shubus Viewer.

Make sure to install the Unity Web Player plugin, accordingly to your operating system's architecture, to be able to play Unity games.
Unity Web Player 32-bit
Unity Web Player 64-bit

UniPlayer

It is possible to play Unity games offline or separated from the website they are hosted on. Offline is, of course, only an option if the game is not purely multi-player.

The good news is that you can download many Unity games and play them, regardless of an internet connection. Another benefit is that it is usually faster than playing the games in the browser.

Here are the steps to be done:

1. You need to install the Unity Web Player plugin on your system.
2. Download the latest version of UniPlayer from this website. It is the tool used to play Unity games.
3. Optional: Install a cache browser for easier access to Unity files. Firefox users can check out CacheViewer.

All steps above are one-time processes. To download and play a Unity game offline, do the following:

1. Open the game in your browser of choice. This downloads it to the cache of the browser.
2. Use a caching extension or browse your browser's cache manually to locate the .unity3d file in the cache.
3. Drag and drop the file into UniPlayer's interface.

NOTE: In Firefox you can also do [CTRL+SHIFT+I] to bring up the web inspector on the game page, click on the search box (left of the "Rules" tab), type in 'unity3d' and keep pressing [Enter] until you get a chunk of Javascript code. Double-click on the highlighted text and look through it for a file path that ends in ".unity3d", then just copy the path into the URL bar. If it doesn't include a domain, simply add the domain you're already on. (Example: http://thedomain.com/PATH/TO/GAME/FILE.unity3d). Load the URL and your browser should download the file.
In Chrome you can just right-click the page, click on "Show webpage's source code", do [CTRL+F] and search for 'unity3d'. You should then get an URL pointing to the file.