Also talk about inefficient.

Why burn a 4th pevel spellslot for polymorph, when a simple jump spell would have done the job.

borderlands 2

optimally you scour up up to three friends to play with, but even alone the game is excellent.

it has a great story with one of the best villains in gaming ever (my opinion) as good as glados.

apropos glados the portal games are also a definite must play (what with portal 2 being the highest ranked steam game ever.)