Team Fortress 2 has dislodged perennial chart hog Counter-Strike from the top of Steam's most-played list.

As noted by PC Gamer, the announcement earlier today that Valve's team-based shooter has gone free-to-play sent the game rocketing from the lower reaches of the top 10 to the number one spot, which Counter-Strike has owned since time immemorial.

It seems, for today at least, the move to a microtransaction-supported business model has won the game tens of thousands of new users.

At the time of writing 69,962 users were playing Team Fortress 2, compared to 54,754 on Counter-Strike.