Another tidbit about Space Invaders Extreme, which isn’t highlighted, is its network features. Two players can compete in a versus mode and race to shoot aliens before they crawl to the bottom of the screen. In the Nintendo DS version the bottom screen has your aliens. The top screen shows the progress of the other player. The DS release also takes advantage of Nintendo Wi-Fi to connect players and record scores for a world ranking system.
Unfortunately the PSP version only has local, ad-hoc play, which nixes the online leaderboards. Ouch. To add insult to injury multiplayer battles shrink the second player’s progress to a tiny window. While the wider PSP screen is nice, I’ll take the DS version.