The ultra-deep alternate reality game that Valve is reportedly playing with may be reaching a critical point.
The Valve ARG Wiki has assembled the various pieces of the puzzle which have presented themselves inside updates of various indie games on Steam.
The result is an image of what looks like some kind of diving bell or bathysphere. What all of these means is anyone's guess at this point.
Some have speculated that all of this is just a way to promote Valve's next game Portal 2 which is due out in just 10 days in the US.
Others, however, believe it's leading to something more than a simple ad for a game.
Stay tuned, we reckon.