The first thing you have to do is actually test the latency using actual tools rather than games. Games are affected by too many things and they tend to blame network even when it is some bug in the game.
What you need to do is use the actual ping command to test. I would start by running a constant ping to some common ip like 8.8.8.8. This should have fairly low ping times but I am unsure what you get in alaska especially if you are not in one of the larger cities. Key though is this is a large google DNS server that should be fairly close to you. These servers have massive ability to process data so the server itself will not cause latency spikes.
Key here is let this run in the background while you play the games. You want to see if there is a corresponding increase in this ping when they game claims there is more latency.
In either case latency is hard to fix, the ISP barely guarantee the bandwidth with their "up to" garbage. If you see issues to the 8.8.8.8 address your primary things to look for would be if you are somehow overloading the bandwidth you pay for. If it shows nothing you start to be suspect of the game. You would have to see what is different in the games that have normal latency and others, maybe the servers are in different locations.