<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-04-24</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000278165</issuerCik>
        <issuerName>STRATEGIC GAMING INVESTMENTS, INC.</issuerName>
        <issuerTradingSymbol>SGME</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001321001</rptOwnerCik>
            <rptOwnerName>Schroeder Lawrence Scott</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3959 RUSKIN STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LAS VEGAS</rptOwnerCity>
            <rptOwnerState>NV</rptOwnerState>
            <rptOwnerZipCode>89147</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>CEO/President and Director</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
                <footnoteId id="F3"/>
            </securityTitle>
            <transactionDate>
                <value>2007-04-24</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>9070</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>9.07</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2440840</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Mr. Schroeder was issued 3,400,000 shares of common stock (the Shares) in conjunction with the merger (Merger) consummated between Left Right Marketing Technology, Inc., a Delaware corporation, and Strategic Gaming Investments, Inc., a Nevada corporation (SGI), on April 18, 2006.  The Shares were issued as an exchange, whereby Mr. Schroeder exchanged 100% of his common stock holdings in SGI for the Shares.  The exchange was valued at $3,400, which equates to the par value of the common stock of Left Right Marketing Technology, Inc., or $0.001, times the number of shares issued in the exchange.  Upon the close of the Merger, Left Right Marketing Technology, Inc. amended its articles of incorporation to change its name to Strategic Gaming Investments, Inc.</footnote>
        <footnote id="F2">On July 7, 2006, Mr. Schroeder disposed of 968,220 shares of common stock through a private sale.</footnote>
        <footnote id="F3">On April 24, 2007, Mr. Schroder purchased 9,070 shares of common stock from S. Matthew Schultz.  The purchase price was $9.07, which equates to the par value of the common stock of Strategic Gaming Investments, Inc., or $0.001, times the number of shares purchased.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Lawrence S. Schroeder</signatureName>
        <signatureDate>2006-05-01</signatureDate>
    </ownerSignature>
</ownershipDocument>
