Index
U
Ulam, Stanislaw, 161
Ultima, 81
Ultima Online, 344, 538–539, 558
Um Jammer Lammy, 387
uncertaintyand decision types, 174–175
as game trait, 76, 174
guesswork, 194–195
and information, 193–197, 201, 205, 208
manipulating, 185–186
and meaningful play, 174
micro and macro, 189, 194
in narrative, 388–389, 418
and pleasure, 337
randomness, 175–176, 183–184
vs. risk, 174–175
See also chance; probability
Underwood, Mick, 46
unexpected events. See emergence
Universal Square, 563–564
Unlocker, 347–349
UNO, 86
Unreal, 89
unsportsmanlike players, 269, 271, 481
utilitarian participation, 59
utility, 237–238, 240, 245