Many free game sites make money through ads, some of which can be intrusive.
There is NO official "hot" version of Undertale made by Toby Fox. If a site promises Undertale Unblocked Full Game Hot with adult content, it is likely a fan-made ROM hack or, worse, a malware trap. undertale unblocked full game hot
A true browser-based game should not require you to download a .exe file. Many free game sites make money through ads,