No. 3: Fallout
The spiritual successor to:
Though the look, hell... even the genre, of the Fallout series has evolved since its inception in the late nineties, the concept remains the same: explore wastelands ravaged by nuclear apocalypse, using your wits to survive by carrying out quests, earning experience points, and shedding blood when it can't be avoided.
It's true that Wasteland is not as celebrated as its unofficial sequel, which has developed into a goliath of a series that's thriving even today (with Fallout 3 and its numerous expansion packs). But Wasteland played an important part in Fallout's life by laying the groundwork out for one of gaming's biggest franchises.
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