Scottish Conservative leader Annabel Goldie has ruled out entering into any coalition with rival parties after the Holyrood election in May.
She made the announcement as the Tories launched their manifesto which included a £1bn, four-year drive to cut drugs and crime.
She said a coalition government had failed in Scotland and that people wanted to know what parties stood for.
The party pledged to deliver on issues which "mattered to voters".
The manifesto was launched in the Borders.
Plans include sweeping changes to education and moves to improve transport and the economy.
"Our manifesto policy commitments are not for sale in any post-election horse trading process"
The party said it would boost transport by looking into high-speed rail links and would plough £30m a year into upgrading Scotland's key roads.
Other proposals include the building of a new private prison, 1,500 extra police on the beat plus tougher sentences for persistent repeat offenders.
On drugs, the party said it would spend £100m each year helping people kick their habit, while clamping down hard on dealers.
The manifesto has also set out plans to help poorer families get homes and give more control to head teachers in schools.
Ms Goldie said: "Our manifesto policy commitments are not for sale in any post-election horse trading process since other parties can cobble up deals behind closed doors.
READ THE MANIFESTO
"The Scottish Conservatives will enter into no pacts and no coalitions. We will operate on an issue-by-issue, case-by-case basis and do what's right for Scotland."
Instead, the party will back individual legislative proposals brought forward by other parties which they can support without entering into any kind of formal ruling partnership.
"I think what we've seen is eight years of fudge, compromise, dodging issues and frankly reducing everything to the lowest common political denominator," Ms Goldie said.
"That has failed Scotland. I think it's time for a fresh approach."
Ms Goldie said the £1bn pledge to fight drugs over the next four years was a landmark commitment.
"This is the biggest assault on crime and drugs ever seen in Scotland and it is long overdue," she said.
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