Name them all!
This opening video for upcoming Japanese PSP game Battle Robot Spirits will either be a who's who of anime mecha or a mess of lasers and boxy metal heaps to you, depending on your interest level. I'm a huge f*cking nerd, so it does something for me. Over 20 mecha anime series are jumbled together for this brawler.
Anime fans will recognize Macross Frontier, Code Geass, Armored Core, and even Full Metal Panic? appearances in the line-up. You'll find a full list of included series below.
Too bad it's a PSP title. Vita would make more sense to me.
Included mecha anime for Battle Robot Spirits, via Crunchyroll:
Psalm of Planets Eureka SeveN
Psalms of Planets Eureka SeveN: Good Night, Sleep Tight, Young Lovers
Code Geass: Lelouch of the Rebellion
Code Geass: Lelouch of the Rebellion R2
Code Geass: Akito the Exiled
Fafner in the Azure: Dead Agressor
Fafner in the Azure: HEAVEN AND EARTH
Lagrange - The Flower of Rin-ne
Full Metal Panic! The Second Raid
Full Metal Panic? Fumoffu
Heavy Metal L-Gaim
Aura Battler Dunbine
Space Runaway Ideon
Armored Core V