Half or Nothing is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Half or Nothing is Unlimited.
YGOPRODeck lists Half or Nothing for these formats: Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Half or Nothing appears in Battle Pack 2: War of the Giants (BP02-EN201) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Half or Nothing is about $0.04 on Cardmarket (prices change frequently).
