The Space Invaders graphics heavily repurposed the retro style, like Mario plumping up into a rampaging, jaggy sprite in The New Super Mario Bros. Certain alien ships closely follow the original shapes, while others take giant, blocky forms, and others have smoother lines. Occasionally, the alien attackers twist into thin lines, as if turning 90° to avoid your shots. The hodgepodge worked to uproot my expectations.

Advancing ships follow several new patterns, but the biggest change rewards players for hitting them in certain orders. Knock-off all of the like-color baddies without missing, and a power-up adds new abilities. My favorite blasted a white beam, about as wide as a standard alien ship, eviscerating an entire column at once.

After clearing certain levels, I launched into one of several "extreme" modes. Once, alien ships replaced the top-screen scoreboard, stretching the game across both LCDs. Other times, they raced and attacked with more fury, from more angles, with more weapons.

I wasn't able to sample it, but the game includes two-cartridge, two-player competitive matches locally or over WiFi. And a WiFi leaderboard lets gamers etch their initials into the online record-book.

Space Invaders Extreme will release on June 17 in North America for DS and PSP. (It launched last year in Japan.) At the bargain price of $20, it should easily be on the short list of arcade-shooter fans.