List of S&box games. S&box is a game engine and platform developed by Facepunch Studios, that allows developers to create and share their own games. The platform is still in development but already features a variety of first and third-party games, ranging from sandbox experiences to party games and survival simulators. Facepunch intends to allow users to export games made with S&box to sell on Steam and other platforms. S&box is currently in a "Developer Preview," meaning that users can try making their own games.

First-party games

Sandbox 
Facepunch Studios is developing an official sandbox mode for S&box. This mode is a direct response to community expectations for the platform, and its completion is a prerequisite for the full release of S&box.

Opium 
Opium is a PSX-style, first-person melee-focused brawler game set in a run-down apartment building occupied by violent characters with occult undertones. It combines a rock-paper-scissors combat system with light puzzle elements and a weapon scavenging loop. The game was initially broken, but has been fixed and the demo is playable again, although there are no current plans to continue its development.

Third-party games

Team Fortress: Source 2 
Team Fortress: Source 2 (TF:S2) was a fan-made project that aimed to recreate Team Fortress 2 in the Source 2 engine using S&box. The project was led by Amper Software, previously known for their work on Creators.TF, a platform for developing unofficial Team Fortress 2 content.

The team had made considerable progress, porting assets from the original game and demonstrating several playable classes, including the Pyro, Scout, Sniper, Demoman, and Soldier. They had also completed work on a full map, Arena Well. The team’s motivation was to show the potential of the Source 2 engine and improve upon the original game's performance issues and messy code. According to the lead programmer, the original Team Fortress 2 code was "a two-decades-old compilation of code, written by different generations of programmers".

However, the project faced significant challenges and was ultimately shut down. Firstly, Facepunch announced major changes to S&box, which rendered most existing games, including TF:S2, unplayable. These changes were meant to improve S&box in the long term. Secondly, Amper Software received a DMCA takedown notice from Valve on all their public GitHub repositories, effectively ending the project. The team acknowledged that Valve had the right to protect their IP. The takedown notice was the "nail in the coffin" for the project. While there was some doubt about the legitimacy of the DMCA takedown, it was ultimately determined to be legitimate, and it also seems that the team had already been considering moving on from the project.

My Summer Cottage 
Developed by Small Fish, My Summer Cottage is a Finnish survival simulator that won first place in the first Facepunch-hosted S&box game jam. The game blends the mundane aspects of Finnish life with unpredictable events. Features include a day/night cycle, fishing, an inventory, character creation, and a dialogue system. My Summer Cottage also includes various tools and gizmos to aid in content creation. The game utilizes ActionGraph, enabling artists to actively contribute to the game's development. The developers plan to release it on Steam in the future.

Micro Mayhem 
Created by Ape Tavern, Micro Mayhem is a platform game designed as a low-scope, fun party game that can easily be played with friends. The game was made for and placed first in the second S&box game jam, with a focus on simple and fun gameplay.

Party Goobers 
Developed by Saandy, Party Goobers is a one-button party game inspired by the Mii era of Nintendo games, where players compete to earn the highest score in a series of rounds. The game features unique characters called "Goobers" and supports online play for up to 24 players.

Grubs 
Grubs is a worms-inspired artillery game developed by Ape Tavern featuring randomly generated levels. Previously broken during the retooling phase, it was rewritten using the S&box scene system and allows for customisable "grub" teams, a level editor, and custom game rules. Grubs is open-source and available on GitHub.

References 

S&box
S&box