Fight in the Boneyard whenever possible to get boost items, tickets, and other rewards.
Invite Code bonuses
Share your invite code the indicated number of times to receive the following card.
Rare Nun Card: 1 Invite.
Rare Samurai Card: 3 Invites.
Tyrannosaurus Rex Card: 5 Invites.
Rare Grigori Rasputin Card: 7 Invites.
Rare Cleopatra Card: 10 Invites.
Targeting
When shooting Deadmen, the shot location does not change the amount of damage. Aim for the parts that are large and most visible. Go after yellow targets whenever possible for the extra time. Only a set amount of Deadmen will spawn at once. If you do not reduce their ranks, new ones will not appear. When you are almost out of ammunition and there is nothing to shoot at, intentionally fire at nothing until you reload a full clip.