The originalMetal Gear Solidstands the tryout of time as one of the most significant telecasting games ever made , but dated puzzles like the Temperature Key will leave you struggle to find a solution . Also know as the crony puzzle , this can be a genuinely puzzling riddle , unlike the challenge of similar secret like the CD Box . The obtuse labor environ the Temperature Key are anything but straight .

After defeating bosses likePsycho Mantis inMetal Gear Solid , you ’ll eventually reach Metal Gear REX and snap aPAL keyneeded to deactivate the nukes . The key is found in thecommand officeand isyellow - coloredwhen you look at it . Your missionary work here is to change the temperature of the paint so that it changes color twice , then return to the place and interact with the command console two disjoined clock time .

You have to leave the control office andreturn two times , once for every prison term you modify the PAL key temperature .

Arthur Morgan, V, and Link over a blurred Elden Ring Background

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The Blue Key in Metal Gear Solid

To change the PAL key toBlue , you need toexpose it to cold temperatures , which are gratefully easy to find close to Metal Gear REX . Return to the area where you foughtVulcan Raven , then wait for the Francis Scott Key to turn blue after a curt prison term . hold in theItem Menuwill let you see if the PAL tonality has alter people of colour as you avoid safeguard and other enemies inMetal Gear Solid .

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Once the key twist gloomy , return to the top of Metal Gear REX to the command office anduse the Francis Scott Key on the data processor . Be measured since enemies repopulate this spot each time you returnfrom altering the PAL key ’s color inMetal Gear Solid . There aregun turretsnear the entrance , along withtwo camerasthat will lock the doors to the office and mobilise several guards if Snake gets spotted at any peak .

Oblivion Lelles shopkeeper with the docks of Anvil behind him

The Red Key in Metal Gear Solid

As one may have a bun in the oven , change the PAL key fruit to aRedcolor involve exposingit to hot temperatures , which involves much more backtracking than before . You have toreturn to the Blast Furnace area , occupy with liquefied liquid state , to heat up up the Florida key . Two elevator rides stand between Snake and this room , with very few spot to safely hide as the key gets warmer and warm inMetal Gear Solid .

Find a unspoiled spot to duck from enemies while the heat touch on the tonality , then go back to the office and interact with the information processing system just like you did with the profane key . This will trigger a ambush where the way begins to glut , and you ’ll call for to call Otacan for help . put on the Gas Mask from your inventory should help you get past the Temperature Key mystifier once and for all , leading to the next segment ofMetal Gear Solid .

A closeup of Aerith with a concerned look in the ruined church from Final Fantasy 7 Remake.

Metal Gear Solid REX Cover

Metal Gear Solid Vulcan Raven

Metal Gear Solid Blast Furnace

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Metal Gear Solid