they play games because they consider themselves as the defenders of the universe. they believe that sooner or later there will be an apocalypse, so they are training against the catastrophes whats odds are the biggest to happen.
so there are some solid reasons why they play certain kind of games.
they play 2D shooters (mostly Wizard of War, Operation wolf and Gyruss) because there is a chance that our universe is going to be invaded from not an upper, but a lower dimension. defending humanity from an attack like that would require special training, especially as we would likely have to attack the aliens in their home worlds (because they have the advantage of being invisible from one side in 3D if they turn 90degrees to you as they are damn flat).
for the same reason (as we are not sure how is "moving" possible in lower dimensions), they play Heroes not only on hexa fields, but with a mod what is adjustable about the main polygon fields. it can also be random. so as at the original game you can move to 6 directions, the mod is setting it by different variables. so its' Random of Might and Magic, Blackhole Might and Magic, Quantum Might and Magic, Chaos Might and Magic, etc.
they play strategy games to fight against the biggest friend and enemy of humanity, the AI. it's very likely to face it sooner or later not only in computer games but IRL. there is hope however, just think about how humans can beat computers in chess. as long as humans are programming the AI, there will be always bugs, and you can make fool of the computer. there are many clichés (ffs i could write this with perfect typo instantly :-O) already in sci-fi literature for this, so i guess there is no need to explain it. to make it more complex, they are usually making mods to combine different games, partly because of the dimensional problem, and partly because of quantum physics. so for example they play starcraft terrans against dune 2's harkhonnens, where the critters are growing Tycoon or Sim City maps. they also mix turn based games with RTS.
they play 3D shooters because NATO and many organizations are already(!) planning to engage robot(!) warriors in wars. srsly, there is no reason to sacrifice human lives in wars, because killing people is usually not even bothering the enemy also. killing expensive robots and mechas (what are the other, face to face version of the same thing, seen at the "toilet" scene). who else can control theese stuff better than a professional FPS player? people like you will be the the future's army instead of sweating, burping, farting, smelly grunts. make war from your sofa - you will probably see this on posters very soon. most of the countries are already not having military conscription (well maybe finland does i guess), so it's quite bright that this will be the future.
they also play many other games for certain reasons like theese, usually with modifications. one of their favorites are playing quake3 on a modified übernightmare level, but with street fighter characters, or like with sonic (they all behave exactly like in their own games so they cant pick up weapons).
and so on... :-)
[i am actually writing the comic by answering questions like this so thnx for this again]
[EDIT]= the brazilian band, Megadriver, who can be familiar for who are seeking for remakes of consol game musix, agreed to use their songs in the comic. i hope to convince them to make some certain music elements later if i can get a sponsor (wich is very likely if i can manage to be ready well, in 2 days).
