Tooniverse Progamer Korea Open (99 Oct 2 ~ 99 Dec 30)
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2.

3.

4.

Hanaro Tongshin OSL (00 Feb 16 ~ 00 May 16)
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2.

3.

4.

Freechal OSL (00 Jul 24 ~ 00 Nov 1)
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2.

3.

4.

King of Kings 1 Tournament (00 Dec 4 ~ 00 Dec 28)
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2.

Hanbitsoft OSL (01 Feb 16 ~ 01 May 5)
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4.

Coca-Cola OSL (01 Jun 15 ~ 01 Sep 8)
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3.

4.

SKY 1 OSL (01 Oct 19 ~ 01 Dec 28)
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3.

4.

KT King of Kings 2 Tournament (02 Jan 12 ~ 02 Feb 22)
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2.

NATE OSL (02 Mar 29 ~ 02 Jun 9)
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4.

SKY 2 OSL (02 Jul 12 ~ 02 Oct 12)
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2.

3.

4.

Panasonic OSL (02 Nov 15 ~ 03 Feb 14)
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2.

3.

4.

Olympus OSL (03 Apr 4 ~ 03 Jul 13)
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2.

3.

4.

MyCube OSL (03 Aug 1 ~ 03 Nov 9)
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2.

3.

4.

NHN Hangame OSL (03 Dec 12 ~ 04 Mar 21)
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2.

3.

4.

Gillette OSL (04 Apr 30 ~ 04 Aug 1)
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2.

3.

4.

EVER 2004 OSL (EVER 1) (04 Aug 27 ~ 04 Nov 20)
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3.

4.

IOPS OSL (04 Dec 17 ~ 05 Mar 5)
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3.

4.

EVER 2005 OSL (EVER 2) (05 Apr 8 ~ 05 Jul 2)
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3.

4.

So1 OSL (05 Aug 5 ~ 05 Nov 5)
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2.

3.

4.

ShinHan 2005 OSL (05 Nov 25 ~ 06 Mar 4)
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3.

4.

ShinHan 2006-1 OSL (06 Apr 12 ~ 06 Jun 24)
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6.

ShinHan 2006-2 OSL (06 Aug 18 ~ 06 Nov 18)
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5.

6.

ShinHan 2006-3 OSL (06 Dec 13 ~ 07 Feb 24)
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5.

6.

Shinhan Masters (07 Mar 5 ~ 07 Mar 17)
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2.

Daum OSL (07 May 11 ~ 07 Jul 21)
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4.

EVER 2007 OSL (EVER 3) (07 Sep 21 ~ 07 Dec 22)
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3.

4.

Bacchus OSL (08 Jan 1 ~ 08 Mar 15)
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2.

3.

4.

EVER 2008 (EVER 4) (08 Apr 16 ~ 08 Jul 12)
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2.

T3.

T3.

Incruit OSL (08 Aug 4 ~ 08 Nov 1)
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2.

T3.

T3.

Batoo OSL (08 Dec 17 ~ 09 Apr 4)
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2.

T3.

T3.

Bacchus 2009 OSL (09 May 6 ~ 09 Aug late)
1. fantasy
2. die.jaedong.die
3. Bisu
4. Flash
5. jkillashark
Thanks to X)Benny and Waxangel for grandfathering these threads and inspiring me to write threads like these for public use.
Many thanks to MyCube for helping find those old semifinalists' nicknames.