Steam has another great Valentine's Day sale, offering deep discounts on cooperative games.

　　Some highlights from the sale include Borderlands: The Pre-Sequel for $30, Borderlands 2 for $5, Saints Row IV for $5, and many more.

　　The sale, which started today at 10:00 a.m. PST, will last until Monday 10 a.m. PST.

　　Steam isn't the only one offering Valentine's Day-themed sale today. In case you missed it, Sony is currently holding a PSN flash sale on a ton of PlayStation 4, PlayStation 3, and PlayStation Vita games.

　　For more great discounts, check out GameSpot's regular Gaming Deals posts.

　　Here's the full list of discounted games included in Steam co-op sale:

　　Serious Sam 3: BFE -- $8Dungeon Defenders -- $3The Jackbox Party Pack -- $18.74Saints Row 2 -- $2.49Borderlands 2 -- $5Gang Beasts -- $13.39Viscera Cleanup Detail -- $8Serious Sam HD: The First Encounter -- $3Chariot -- $10.04Sanctum 2 -- $3Broforce -- $11.24Lethal League -- $7Garry's Mod -- $2.49Serious Sam 2 -- $2Magicka -- $2.49Gauntlet -- $10Guns of Icarus Online -- $3.74Borderlands -- $7.49Portal 2 -- $5STARWHAL -- $10.04Sanctum -- $1.49Saints Row IV -- $5Saints Row: The Third -- $3.74Borderlands: The Pre-Sequel -- $30Dungeon Defenders II -- $20Project Zomboid -- $9.74Orcs Must Die! 2 -- $3.74Don't Starve Together -- $17.24TowerFall Ascension -- $11.24Terraria -- $3Castle Crashers -- $3.74