Possibly the best deal in the GMG Halloween sale today is Left 4 Dead 2 slashed to only $3.12 - a new low by about a buck. Normally a $20 purchase.

Left 4 Dead 2 hits its all time low (okay $0.15 off its all time low of $3.85, but close enough) today at GMG. A buck cheaper than the Steam Summer Sale last month and $16 off the usual $20 MSRP.

Grab L4D2 for only $4 and get a free mystery game (worth around $2-$3) for your trouble. Steam keys for both titles. A good buy if you don't have the game in your library just yet for whatever reason.

Honestly you can't go wrong with Left 4 Dead 2 at lowest ever price of $3.90. Great co-op title to roamp through with friends, especially if you're looking for a Halloween themed title. Lowest ever price.

Left 4 Dead's been free before, but otherwise it's been a month or so since we saw it at the $5 mark. No coupons or rebates - just an instant discount that beats Amazon and other retailers by $15.

Left 4 Dead Bundle with Left 4 Dead 2 and Left 4 Dead 1 only $4.68 today after coupon at GMG. Lowest price ever by a little over a buck and over $25 off the usual $30 list price.

Six bucks gets you both Left 4 Dead titles. Near lowest ever price thanks to GMG's Summer Sale Day 1 batches of zombie themed games going on sale. Steam keys.

Both Left 4 Dead and Left 4 Dead 2 bundled together for $6 at GMG. Ties the previous low (actually $0.20 off its all time low, but close enough) with its 80% price break after coupon.