Lotto Strike is a statewide companion game to NSW Lotto played in New South Wales and the Australian Capital Territory only, and administered by New South Wales Lotteries. Originally based on NSW Lotto's Monday and Wednesday draws, Lotto Strike also became available for play on Saturday Lotto after the midweek NSW Lotto changes in 2004. Lotto Strike can be played only when a standard Lotto ticket is also bought - ie. Lotto Strike cannot be bought separately. Lotto Strike costs $1 per game plus agent's commission.

It shares some similarities to Super 66, in that it involves matching numbers being selected in the correct order. However, unlike Super 66, Lotto Strike uses the same set of numbers as the main draw - the winning numbers of Lotto Strike are the first four winning numbers drawn in order. Also unlike Super 66, which is available in most states by computer auto-pick only, players can select their own Lotto Strike numbers on a separate entry form.

Prizes can be won for matching at least one number in the correct position. Prize divisions offered by Lotto Strike are:
Strike Four (Jackpot) - match all four numbers in the correct position
Strike Three (about $1,000) - match three of the numbers in the correct position
Strike Two (about $80-$100) - match two of the numbers in the correct position
Strike One (one free Lotto Strike game) - match one of the numbers in the correct position

The Strike Four jackpot starts at $100,000 and increases by about $30,000 (depending on sales) with each draw. Due to the relative unpopularity of Lotto Strike, jackpots occur often and it can often take many months for a Strike Four prize to be won. The Strike Four prize is capped at $2 million, with any further jackpots being added to the next Strike Four pool after it is next won.