Buy Eye of Syn PC key

Eye of Syn is a 2D tower defense game set on an Earth ravaged by a deadly zombie virus. You play as Lucretia, a young girl who made a deal with the eldritch demon Argus for powers to fight the zombies. The bargain splits her soul between post-apocalyptic Earth and Syn, a horrifying extra-dimensional land, and you must defend yourself in both realms while searching for Argus.

Defend both realms

Collect monstrous summons and strategize against relentless hordes of twisted zombie foes. You can swap between Syn and Earth in combat and equip power-ups that trigger when you change realms.

Combine demon buffs

Place demons in the right positions to use their buff zones. When one demon is placed in another's zone, both mutate into stronger variations. There are over 30 combinations, which you can discover and track in the Codex.

Use realm abilities

Swap abilities activate when the bottom-left bar is full and you change dimensions. Blood Rain summons a storm of lightning that damages zombies at random. Syn abilities are activated by clicking the bottom-right icon and then a location on the map; Lightning Strike calls down a bolt at that specific spot.