May was a sluggish month for the video game industry, with combined software and hardware sales figures dipping below the $1 billion mark for the first time since August 2007, according to the latest figures from NPD.

Sales were stagnant across the board and in some cases, unit sales of certain platforms took a significant dive when compared to last month. This decline was most evident with the Wii, which sold 289,500 units in May, compared to 340,000 in April. The Nintendo DS family remained on top, shifting a respectable 633,500 units.

See the full breakdown after the jump.

Hardware Units

PlayStation 2 117K
PlayStation 3 131K
PSP 100.4K
Xbox 360 175K
Wii 289.5K
Nintendo DS 633.5K

Top 10 SKU’s May 2009

Publisher Platform Rank # Units
UFC 2009 UNDISPUTED THQ Xbox 360 1 679.6K
Wii FIT W/ BALANCE BOARD NINTENDO OF AMERICA Wii 2 352.8K
EA SPORTS ACTIVE BUNDLE ELECTRONIC ARTS Wii 3 345.8K
UFC 2009 UNDISPUTED THQ PS3 4 334.4K
INFAMOUS SONY PS3 5 175.9K
POKEMON PLATINUM VERSION NINTENDO OF AMERICA NDS 6 168.9K
MARIO KART W/ WHEEL NINTENDO OF AMERICA Wii 7 158.3K
PUNCH OUT!! NINTENDO OF AMERICA Wii 8 156.9K
X-MEN ORIGINS: WOLVERINE UNCAGED ED ACTIVISION BLIZZARD Xbox 360 9 120.7K
Wii PLAY W/ REMOTE NINTENDO OF AMERICA Wii 10 109.8K

Read more: July NPD: Industry Sales Remain Sluggish, Wii Sports Resort Leads Software Sales, July NPD: Nintendo Leads Once Again, PS3 Sales Normalize, January NPD: Xbox 360 Outsells PS3, Industry Sales Up 13 Percent Over Last Year, June NPD: Yearly Sales Decline By 31 Percent, Economy Likely To Blame, September NPD: Nintendo Leads Despite Xbox 360 Price Cut