The other endings are here, and both of 'em wind up with
Nicholai being real dead.
Ending #2:
Instead of negotiating with Nicholai, Jill blows him out of
the sky. Aside from that small yet satisfying detail, this
is the same as Ending #1.
Ending #3:
Instead of jumping off the bridge, Jill shoves the Nemesis
off and walks into the abandoned factory via the front door.
She and Carlos meet up in the second-floor break room, where
a visibly exhausted Carlos tells her about the incoming
missiles. Things proceed as above after that, but when Jill
reaches the trash room, she's ambushed by Nicholai. From
cover in front of the trash room, Nicholai explains that
there's a "modest" bounty offered by Umbrella for whoever
kills Jill, which he intends to collect. Jill tells him,
basically, to stick it.
Nicholai replies by firing a couple more shots at Jill.
Something, probably the Nemesis, grabs Nicholai from behind.
Jill hears him scream, followed by some wet crunching
sounds. When she rounds the corner, she finds Nicholai's
dead body hanging off of the pipes in the ceiling.
When Jill reaches the communications tower, she hears an
incoming transmission from Carlos. Carlos tells her to take
the nearby radar receiver and meet him elsewhere.
After Jill's showdown with the Nemesis, she rides the
elevator up to find Carlos waiting for her in Nicholai's
helicopter. Jill watches Raccoon explode as they fly off,
saying that this time, "they've gone too far."