Apparently this is Metal Gear Solid week. Aside from MGS V itself, the official guide can be preordered at a discount. And if you were looking for a new pair of headphones, you might want to check out the Hori MGS V limited edition.
But let's talk about deals. Have less than $10 to spend on gaming this week? You can get these games for the price of a coffee: Uncharted 3 (PS3) is $3.99, Borderlands: The Pre-Sequel is $9.99 on Xbox 360. Dark souls: Prepare to Die Edition (PC) is $5.00 as well. Fallout 3 GOTY Edition (PS3) is $8.46, Crysis 3 (PS3) is $7.40. Rabbids Invasion(X360) is $4.99. The NA PSN has a "retro sale" going on, with lots of stuff below $10 in particular if you"re a PSN+ member.
Need more? Dragon Ball Xenoverse (PS4) is $29.99. Splatoon on Wii U is $49.99 for Prime members. Dark Souls II is also $29.99 for PS4. On Steam, Defense Grid 2 is 75% off this week. Humble Bundle have a "Might & Magic" bundle that ends in about 24h.
In preorders, the Dualshock 20th anniversary edition has been alternating in and out of stock. People expecting to get the classy white object on launch day should probably preorder it if they see it in stock.
Also, yeah, have you heard? MGS V: The Phantom Pain is getting terrific reviews so far.