Got a gamer or two on your holiday shopping list? Of course you do, though knowing which games to get them can be a tricky proposition. A flood of video games are vying for your attention on retail shelves, making the buying process pretty daunting if you're not in the know — plus they probably grabbed a few games already.

We're here to help. Any of the following 12 games should keep the gamer in your life happy as a clam this holiday…or at least until the Next Big Thing comes out.

Activision's cash machine is still running smooth.

In what's becoming a November tradition, the latest Call of Duty game is once again the biggest entertainment launch of the year. Activision announced Friday that Black Ops II earned over $500 million in its first 24 hours.

"With first day sales of over half a billion dollars worldwide, we believe Call of Duty is the biggest entertainment launch of the year for the fourth year in a row," said Activision CEO Bobby Kotick. "Life-to-date sales for the Call of Duty franchise have exceeded worldwide theatrical box office receipts for 'Harry Potter' and 'Star Wars,' the two most successful movie franchises of all time."

(Credit: React! Games)One of the key players behind the biggest company in the world is going 8-bit.

Steve Wozniak, who co-founded Apple alongside Steve Jobs and Ronald Wayne, is teaming up with legendary character actor Danny Trejo ("Machete") in an over-the-top action game for -- what else -- your iOS device.

It's called Danny Trejo's Vengeance : Woz with a Coz, and it's really happening.

Black Ops: Declassified (Credit: Activision)Call of Duty: Black Ops II is getting rave reviews, and judging by the early numbers we're hearing, it's bound to be another seriously big seller.

But not all versions of the game are created equal.

Just witness the stunning fall of Call of Duty: Black Ops: Declassified for the Playstation Vita. Intended as a companion to the console game, it was supposed to be one of the handheld's biggest holiday titles.

That's not going to happen, at least if critics have anything to say about it. Reviews of Declassified are just starting to roll in, but with an unthinkably low 29 rating on Metacritic, it's already got a shot at going down as the worst game of 2012.

Rockstar Games takes its sweet time developing its games, and apparently that methodical process extends to its gameplay trailers, too. A full year after unveiling the debut trailer for Grand Theft Auto V, on Wednesday the company finally released a new trailer for the open-world extravaganza.

And while it's a little thin on gameplay, it's chock full of everything else. Crank up the volume and behold your next video game obsession:

10th anniversary Xbox 360 (Credit: Microsoft)Microsoft is sending out some early holiday gifts to long-time Xbox Live users.

With the 10^th anniversary of the online service upon us, the console maker has been sending some of its oldest subscribers a special present: A brand new, limited-edition Xbox 360.

Xbox Live programming director Larry "Major Nelson" Hryb broke the news Tuesday, announcing on Twitter, "I can confirm we're surprising some of the #Xbox LIVE members that have been with us the longest with one of these."

(Credit: Game Informer)You shall not play! At least not past level one or so.

Game Informer reports that a significant number of Xbox 360 copies of Lego Lord of the Rings errantly contain a demo disc.

The good news? The error is only occurring for the Xbox 360 version. The bad news? It's occurring at all.

SAN FRANCISCO (Reuters) - Zynga Inc's chief financial officer, David Wehner, will leave the company for a senior executive position at Facebook Inc, the troubled gaming company announced Tuesday as it reshuffled its management ranks.

(Credit: Reuters/Robert Galbraith)The "CityVille" creator named David Ko, a top executive overseeing mobile games, as its new chief operations officer, a position that had been vacant since August when John Schappert stepped down after the company missed earnings expectations for two consecutive quarters and its stock price fell precipitously.

Wehner, who will become a vice president of corporate finance and business planning at Facebook, will report to CFO David Ebersman at the Menlo Park-based social networking company, which has close ties to Zynga.