Counter strike Global Offensive
From various sources
"Ammo is free as in source, it was debated a couple of times through the day though, so it might not be how it's going to be in the final version, even though I personally think it won't have ammo-buying.
There are a few new guns (and all the guns have been changed more or less, but their current versions aren't at all final). There are also a couple of new nades, which are pretty cool. There are molotov grenades, which create a fire-blanket that slows players are little. It sounds crazy, but it actually played really well I think, even though the size/dmg might need a bit tweaking. The other new nade is a decoy-nade, that can play firing-sounds, so it can be used to fake that a player is in a position. Not sure how usable it is, but the idea is pretty nice I think.
In the current build armor is also free, but I am pretty sure this will be changed, at least for the competitve mode, since most people here thought it was a bad idea and there basically was no point to even have armor in the game, if it was given for free every round.
Because of this armor-change they also revamped the money system, which wasn't too nice, you didn't really get enough money, so sometimes you would end up needing to have 3-4 ecos or having won 5 rounds in a row and still only have 4k left xD This was also down to more grenades and other equipment being available though.
All the maps have names you know, but most of them have been altered. Dust2 only has very minor changes from the source version, but the other maps have some pretty big changes (most importantly dust and aztec have been changed to try and make them more usable for 5on5 play)
The deagle is about as powerful as in source, but it's hard to tell after such little playing time, we spent more time trying out other guns/stuff mostly" (http://www.reddit.com/r/IAmA/comments/jgehv/iama_guy_who_spend_the_day_at_valves_headquarters/)
Rumors:
Planned to be released Q1 2012
Focuses on 5v5 competition
Press release within 24 hours from VALVe
Plays on an updated source engine
Individual & Team rankings
New Guns added
New Grenades
Dust & Aztec major revamp
Spamming still viable
Ammo is free
(http://eseanews.com/index.php?s=news&d=comments&id=9967)
Not my own work, just reposting from various other sources