Deus Ex: Human Revolution in its Autumn Sale. That lowers it to $24.99, alongside The Missing Link DLC -- also discounted to $7.49.
Dead Island receives its own dramatic reversal in price ($24.99), as does Telltale's Back to the Future series ($9.99). The Serious Sam HD double pack is quite the temptation at $2.99, but we've vowed to do something more constructive this weekend. Why not administer intravenous therapy to an ailing patrician for $6.79?