 SpaceChem received a free update in late April 2011 , which added several new features to the game as well as new puzzles . The patch included support for the ResearchNet puzzle creation and sharing system , and for the Steam @-@ enabled version , support for achievements and leaderboards specific for Steam friends . The update for the Steam version also included a small set of puzzles tied in with Team Fortress 2 , which upon completion would reward the player with a decorative item they could use within Team Fortress 2 . The game was included in the Humble Frozen Synapse Bundle charitable sale in early October 2011 . 
