Like clockwork, two more games have appeared on Xbox LIVE’s Games on Demand digital download service, and Xbox 360 gamers are now able to purchase and download the action adventure game, Tomb Raider: Underworld, while more Xbox 360 gamers are now able to get the strategy game, Command & Conquer 3: Tiberium Wars

As is El33tonline’s wont, we’ve collected a bunch of trailers and gameplay videos for both games to give you a better idea of what these games are all about, as well as some official explanations to further fill in those information gaps.

You can find all of that below:

Tomb Raider: Underworld

El33tonline has accumulated some coverage of Tomb Raider: Underworld, which you can check out over here, and be sure to check out our review of the game, as well as our reviews of the two downloadable content packs, Beneath the Ashes and Lara’s Shadow.

What’s the official low-down on Tomb Raider: Underworld?

“Designed specifically to take advantage of the latest technologies Tomb Raider Underworld represents a new advancement in exploration-based gameplay. As fearless adventurer Lara Croft explore exotic locations around the world, each designed with an incredible attention to detail resulting in breathtaking high-definition visual fidelity that creates a truly believable world and delivers a new level of challenge and choice.”

Tomb Raider: Underworld - Launch Trailer

Tomb Raider: Underworld - Jungle Ruins Trailer

Tomb Raider: Underworld - Gameplay Trailer

Command & Conquer 3: Timberium Wars

“Control massive armies and wage war as one of as one of three rival factions in Command & Conquer 3 Tiberium Wars. Embark on an adrenaline-fueled single-player campaign that features explosive 3D special effects, an unparalleled Hollywood cast, and over 90 minutes of live-action video.

“Then, head onto Xbox Live for devastating multiplayer battles with five exclusive modes and Xbox Live Vision support. You alone can decide the fate of the planet in the epic war over Tiberium. Welcome back, Commander.”

Command & Conquer 3: Timberium Wars - Ion Cannon Decimation Gameplay

Command & Conquer 3: Timberium Wars - Ground Assault Gameplay

Go find your region’s pricing for these games over here.