There was a time, back in the early 2000s, where it felt like I spent a good chunk of my gaming time sticking my face onto oversized keyholes and snooping on whatever was on the other side. In stealth-focused games like Hitman and Splinter Cell, there was something wonderfully clandestine about monitoring enemy patrols or eavesdropping on conversations on the other side of a door. Outside of the occasional moment where an enemy would open the door right as I bent down to look through, keyhole-peeping was a slick if small booster of stealth immersion...
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Finally, keyhole-peeping comes to Skyrim
Source: PC Gamer (opens in a new tab)