- Witcher 3 for awesome story & side quests
- Tower of Time for scalable time factor (beats real time with pause, IMHO)
- Echo for dynamic AI that learns from you.
- Sacrifice or Dragon's Dogma for epic spells
So let's put them to work....
Witcher 3 + Tower of Time = epic RPG with superbly told stories but, instead of being straight up action combat, the combat lets you make time go slower/faster via the mouse wheel. The ability to do more per second means the protagonist can have more complex abilities and options.
Echo + Sacrifice = strategy game where your nation takes on a numerous but unsophisticated horde being controlled by some big bad. Your nations has quite a few big, devastating spells which, luckily, weren't used in the first battle. Instead, the enemies were chopped up with with the militia's swords and a lazy wizard's magic missile spells. The next time the horde came knocking, many of them were using magic missiles and they all showed quite a bit more sophistication with swords than they had earlier. Turns out, this big bad is able to watch your battles and learn from what you do. (Might need to limit it so it only remembers the last 6 you used or some such, which is what Echo did.)
Combine all four and.... nah, best not to even dream about such a thing!