it has to be released in 2013.post platform and in decsending order. here is mine: 10. total war rome 2(pc) 9.company of heroes 2(pc) 8.metro last light(pc) 7.battlefield 4(pc) 6.dmc devil may cry(360) 5.splinter cell blacklist(360) 4.tomb raider(360) 3.bioshock infinite(pc) 2.brothers(360) 1.assassins creed 4(pc)

10. God of War Ascension (Ps3)
9. Bit Tip Runner 2 (Ps3)
8. Ratchet and Clank: Into the Nexus
7. Hotline Miami (PsVita)
6. Puppeteer (Ps3)
5. Dragon's Crown (Ps3)
4. Grand Theft Auto 5 (Ps3)
3. Ni No Kuni: Wrath of the White Witch (Ps3)
2. Bioshock Infinite (Ps3)
1. The Last of Us (Ps3)

Honorable mention to 2012's December release of Far Cry 3. Put about 25 hours into last month and absolutely loved it. If considered as a 2013 game it'd be in my top 5.