PlayStation Store Update: Killzone 3 single-player demo shoots up PSN

It's a busy week on the PlayStation Network, as gamers have a range of new offerings to consider, including Killzone 3 and Yakuza 4 samplers, Telltale Games' Marty McFly series, and Tactics Ogre for the PSP.

Leading the charge this week is a single-player demo for Killzone 3. The sampler features a single level, Icy Incursion, which sees players return to the conflict between the human Interplanetary Strategic Alliance and the Nazi-like Helghast. As the title implies, the level will feature a wintry landscape on the planet Helghan, which players must negotiate with the help of jetpacks. Melee combat will also play a major role in the level.

The Helghast, and their red eyes, invade the PSN this week.

Another high-profile demo out now on the PSN is for Yakuza 4. The demo will let players try out all four of the characters and their respective fighting styles. PlayStation Plus subscribers can download the demo today, with all PlayStation Network users getting access to it on February 23.

Out now in the PlayStation 3 download department is the Back to the Future: The Game series ($20 for the entire, five-part season). Taking place six months after the events of the third firm, Telltale's point-and-click adventure series has players traveling through time, mending wrongs, and preventing unthinkable time-travel-related mistakes.

Those not interested in Back to the Future, but another Telltale-developed series, can pick up Sam and Max episodes 2-5 ($9 each). The titles are part of the five-part The Devil's Playhouse season and include The Tomb of Sammun-Mak, They Stole Max's Brain!, Beyond the Alley of the Dolls, and The City That Dares Not Sleep.

Also out now as a PS3 game download is Pure ($20). The quad bike racer sports 30 unique courses ranging from snowy Italian mountains to the rim of a volcano and allows gamers to participate against 15 other racers.

The last PS3 title out this week on the PSN is Acceleration of Suguri X-Edition ($6). The "anime-style, robot fighting action" game has players fighting through 11 distinct levels of action with varied weaponry and a techno-dance soundtrack.

Gamers looking to add to their existing games can download new content for Mindjack. Map Pack 1 ($7) for the shooter will include new multiplayer maps. The Airport Shootout and Construction Carnage maps have gamers defending themselves against waves of enemies, while the Container Maze battlefield sees players winding their way through shipping containers to outflank snipers.

Switching to the PSP storefront, Sony added two new titles to the download space this week, the first of which is Tactics Ogre: Let Us Cling Together ($40). Tactics Ogre is a remake featuring extra subplots, new and redesigned characters, and added gameplay mechanics that allow players to turn back time, either to change the story's direction by revisiting key plot points or to replay critical points of individual battles for a better outcome.

The other PSP title out now is TNT Racers ($8). From dtp Entertainment, the zany racy title has up to four players racing around 18 distinct courses using power-ups like the confetti mines, candy cannon, space rockets, and other items to thwart the progress of competitors. The title also boasts online leaderboards, 45 challenges to compete in, time trials, and custom races.

Gamers looking to the past for fun can download three new PSOne Classics this week. Out now on the PSN is tactical role-playing game Saiyuki Journey West ($6), fighting game Destrega ($6), and strategy game Romance of the Three Kingdoms IV: Wall of Fire ($6).

A full list of the week's deals and new PlayStation Store content, including themes, wallpapers, demos, discounts, and add-on content, is available on the PlayStation Blog.