Legacy of Kain (Note this "cult top-down action-adventure game" in it's description)
Games like Blood Omen: Legacy of Kain (first three recommendations):
Dungeon Siege III
Tomb Raider: Underworld
The Witcher Enhanced Edition
Ouch. Ok, another try:
X-COM: Terror From the Deep
Games like X-COM: Terror From the Deep:
Warhammer 40,000: Dawn of War II
Sins of a Solar Empire
Supreme Commander: Forged Alliance
Well, maybe it's a neat site, but I wouldn't be too happy with it's recommendations.