London 2012 — The Official Video Game (PC)

Sega's Olympic tie-in diminishes global competition into mindless button-mashing minigames, a failure that outperforms #10 only on brevity. AI opponents swing wildly between incompetence and breaking world records by 30 seconds, shattering any semblance of realism. Priced at $39.99 at launch, it costs more than the typical casual title but delivers 80% less challenge. With a player retention rate under 5% after one hour, it's the most disappointing sports game of its generation.