Unfinished 6 games

Game	Achievements	Playtime
Age of Empires II	6% (16 of 294)	about 13 hours
Audiosurf	27% (5 of 19)	about 2 hours
Half-Life 2	28% (9 of 33)	about 6 hours
Portal	34% (5 of 15)	about 4 hours
Rocksmith® 2014 Edition - Remastered	20% (9 of 47)	about 20 hours
Sid Meier's Civilization V	14% (40 of 286)	about 81 hours