An update to R.U.S.E. has been released. The updates will be applied automatically when your Steam client is restarted.
The major changes include:

• No more region lock applied to the multiplayer matchmaking
• VAC (Valve Anti-Cheat System) activation including in-game kick plus ban from official servers for players identified as cheaters
• Several measures and tweaks to combat cheating

Source An update to R.U.S.E. has been released. The updates will be applied automatically when your Steam client is restarted.
The major changes include:

• No more region lock applied to the multiplayer matchmaking
• VAC (Valve Anti-Cheat System) activation including in-game kick plus ban from official servers for players identified as cheaters
• Several measures and tweaks to combat cheating

Source