3. The Silent - Don't Starve
Klei Entertainment are easily one of the most gifted and brilliant developers of our time, and their survivalist masterpiece Don't Starve is an entire world of content just begging to be explored, interacted with and mastered. Gameplay consists of a Harvest Moon-like combination of venturing into the wilderness and returning with whatever procurements you can find, the only constant being that you must have a light source when darkness sets in, otherwise the creatures on the island will kill you. There aren't any checkpoints unless you find specific items, and each new day is its own challenge - hence every unlockable character coming your way if you withstand the harsh environment long enough. Every one that is, except Wes, who you'll have to encounter first as a random trigger inside the Adventure Mode. Following his appearance you then need to defeat a number of Clockwork Monsters (a goal that's particularly hard, as combat isn't Don't Starve's strong suit), and if you emerge successful, Wes will pass out, disappear and be listed as a playable character, along with his trophy, The Silent.