Games Use 100% of RAM - Game Engine Unity at Fault?

[LukeCypert]

I can't figure this out... I'm on Windows 10 64-bit (pre anniversary update) and when I play games the RAM usage climbs to 100% (16GB) and then the HDD spins up to 100% as it flushes the RAM to the page file, but this causes major lag in the game...

Games I tried today are Screencheat, Never Alone and Rockets, Rockets Rockets, Lethal League, Speed Runner... The RAM slowly climbs to 100% in these...

Some games that this doesn't happen is Planet Coaster, Hexcells, No Time To Explain, Battlefront...

Is this an issue with Unity, the game engine??

 

[LukeCypert]

I've tested some other Unity and non Unity games and the Unity games all do this... Hmmm.... I'm posting on Unity's forum also.