low(ish) spec games I have installed:
orcs must die 1 & 2,
magic 2013 duels of the planeswalkers,
nation red,
bastion,
recettear,
dungeon defenders,
legend of grimrock,
realm of the mad god,
terraria,
space pirates and zombies,
king's bounty + expansions,
closure,
ftl,
hotline miami,
torchlight 2,
mark of the ninja,
vessel,
super meat boy,
the binding of isaac,
botanicula,
critter crunch,
fallen enchantress,
Hell Yeah Wrath of the Dead Rabbit,
La Mulana,
Thirty Flights of Loving,
Costume Quest,
Rochard