Categorise engines by game type

[SamLiu]

There should be categorization by intended use, such as 1st person shooter, MMORPG, RPG, RTS, etc etc. Its hard to tell what each engine is used for.
^^"

[NomadRock]

Most engines are more general than that. Very few of them can only be used for one game genre. I think this would add more clutter than useability.

[bladder]

an "in practice" list may be useful though. A list saying which games have used the engine in question, if any.