... by playing Survival Crisis Z, a post-apocalyptic action/RPG thing. I can't tell you what it's like because it messes up on my PC, but Saint_Proverbius, who sent me the link, thinks it's OK. It's only 10 MB as well, so worth a download.
Survival Crisis Z is an open ended intense survival experience that is
nearly as much RPG as it is arcade. Make money or steal it. Buy weapons
or pick them off a fresh corpse. Work for the leaders of the
post-apocalyptic ruin or have them working for you.
Marauders, terrorists, merchants and heroes are all equals here. They
are all either one of us or one of them, warm-blooded or cold,
survivors or monsters.