So moving on from skyrim id like to cover my next game (which is actually out). Mount and blade: Warband is the sequel to the original mount and blade released several years ago. To best describe it, it is an fps rpg with tactical elements. More specifically you play as a character in a medieval age scenario in a made up land (so no guns or cars.) with several warring factions.
As you level up fighting people (in real time) you can gather companions (strong warriors of which there are about 10) and build an army from any of the 5 factions units (which are made up of lots of unique unit types). You can then either join a faction and attempt to eliminate the other factions or set out on your own to forge your own kingdom. The wide range of options are what makes Warband such a good game you can effectively replay the game several times in entirely different ways.
The best part about Warband however is the battles. Since each faction also fields its own nobles who raise their own armies and fight each other you can get battles of 1000 aside. Since this would most likely break your computer the developers limited it to 20 aside....however this did the opposite and made battles very very long. So there is a mod that will allow you to go up to 200 or 300 aside. As you can imagine this makes for some great battles as for example a force of 100 men attempts to hold off against several hundred enemies.
For £20 on steam you really cant beat this game for its quality and the huge range of mods available (which further expands the game almost endlessly.