Ah, the steady march of time. Just as the electronic transition frequency of an atom can be used to measure the passage of time, so too can the frequency with which money is electronically transitioned out of bank accounts during Valve's Steam Holiday Sale.

Today's offerings, which last for the next 45 hours or so, include Dead Island for $6.79, Dungeon Defenders for $3.74, the DOTA 2 Early Access Pack for $15, Train Simulator 2013 for $13.74, 50 to 75 percent off Blood Bowl games and a massive Warhammer 40k: Dawn of War franchise collection for $10.

Unfortunately, RailDriver's insane Desktop Train Cab Controller is not on sale, but take it from us, dressing the part goes a long way in creating the illusion of realism. Especially when you're simulating trains on public transit.