Is there anything the ESRB can't do? Routinely revealing numerous Xbox Live Arcade games, the ratings board has now revealed that Tomb Raider: Anniversary is headed to the Xbox 360. In an interesting twist, the ESRB actually lists five different entries for the game, each with a different locale specified. In all, Peru, Lost City, Greece, Egypt, and Croft Manor are listed. This specificity leads us (and Joystiq) to conclude that Anniversary will be offered as downloadable content. Whether this is done via Tomb Raider: Legend or as independent downloadable episodes remains to be seen (if we had to guess, we'd say it'll be Legend DLC). Considering Anniversary costs $30 on other platforms, a $5-6 price tag for each episode on Xbox Live Marketplace would be reasonable (though we're not necessarily expecting it).
We really enjoyed Lara Croft's first outing on the 360, so here's hoping Eidos makes an official announcement soon.