Microsoft's Block Party promotion pushed XBLA revenues beyond the $10 million mark in March, according to figures from market research firm FADE (Forecasting and Analyzing Digital Entertainment).
GamesIndustry reports that in-cash hit $10.6 million, the first time it's ever got into eight figures for a single month.
Toy Soldiers was the biggest seller in March, with an estimated 209,000 downloads resulting in $3.14 million in revenues.
Year-to-date XBLA sales are flat, however. January and February were disappointing, with the latter estimated at just $6.8 million (£4.4m). Overall, revenue in 2010 has grown by only 5 percent so far compared to 2009.