There is no sign of life on Earth, borders docks and airports closed, have the only hospital on Earth active, and Peru laughs in their hands surviving it with 0 infections :w
For invincibility the following are essential: VINE FIELD (to lose huge groups of enemies), CHARM (to get rid of Stone Chargers), 100 Ice Resistance (to nullify any kind of ice damage), and SANCTIFY (to heal yourself in trouble). Sanctify is much better than HEAL in later levels, because of Multi-Sanctify (Sanctify used on previously summoned Sanctify and so on), it's healing is based on max magic, for example on floor 24 I had over 600 MP so I had a 6 times stronger Sanctify. This spell is rare, so start with Lightwielder race. And of course, always use the better armor. This way I got to floor 51, then I got bored and killed my Lvl104 werewolf.
Insane last level was pretty easy since shrapnel always have a blind spot in it's spreading pattern, so stand on the ground, jump before rocket reach you, and jump back on ground between the shrapnel safe zone and see them opening your door.
 "Hexagon")
 "Dibbles: Pro Pack")
 "Kill the Heroes")
 "Cuboy: Cubeture 2")
 "Pandemic 2")
 "Hack Slash Crawl")
 "Zombie Minesweeper"){kind=logo}
 "Focus")
 "Run 2")
 "Bullet Heaven")
 "Mastermind: World Conquerer")
 "Canabalt")
 "Shadowreign RPG")
 "Escape from Crystal Lake")