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ShinyLoot has a Multiplayer Weekend Specials sale going on.
Undead Legions $1 (Desura)
Trapped Dead $2.50 (Steam + Desura)
Star Hammer Tactics $2.50 (Desura)
Rooks Keep $5.10
Obludia $2.80 (Desura)
Metal Planet $3
KarBOOM $3
FootLOL: Epic Fail League $2.50 (Desura)
Enola $10
Bernie Needs Love $2.50
Arcane Worlds $10 (Steam + Desura)