Frisson is a psychophysiological response to rewarding stimuli like music. It induces pleasurable feelings and transient skin tingling or chills. Typically lasts only a few seconds. Can be triggered by music, poetry, videos, nature, and science
Quests are optional but recommended for progression. Eight quest bears, three quest bees, and Onett can give quests. Black Bear is the first quest giver, located near hives
Unofficial servers offer free access to Mann vs. Machine. Official servers (Mann Up Mode) require Tour of Duty Ticket ($0.99). Tour of Duty Tickets grant access to multiple maps and missions
The Vault requires 10 silver coins to unlock. The Vault of Secrets needs 50 diamonds to unlock. The Chamber of Time is the hardest vault to unlock. The Basement requires completing multiple steps to unlock
Players receive random items every 50 minutes on VAC servers. About 12 items are earned weekly, resetting at midnight GMT. Items can be weapons, equipment, or locked crates. Players must accept item notifications before earning next one. Playtime carries over up to 20 hours to next week
Roblox gift cards range from $10 to $200 with free virtual items. Cards offer both Credit and Robux currencies for platform purchases. Credit can be converted to Robux for in-game items