Georgia (13) 30
Fly-half Merab Kvirikashvili (right) turned in a fine display for Georgia
Tries: Guiorgadze, Machkhaneli, Kacharava
Cons: Kvirikashvili 3
Pens: Kvirikashvili 3
Namibia (0) 0
Georgia claimed their first-ever World Cup victory as they defeated Namibia in wet conditions in Lens.
Merab Kvirikashvili landed two penalties and converted Akvsenti Guiorgadze's try to put the Lelos 13-0 up at the break.
Kvirikashvili then kicked a third penalty and a conversion after Irakli Machkhaneli engineered a fine solo try.
The Georgians added a third converted try when Davit Kacharava intercepted and raced clear at the death.
Georgia won the inaugural meeting between the two sides 26-18 in June and they had the upper hand from the first whistle in northern France on Wednesday night.
Namibia, in the south west of Africa, is generally hot and dry and their national side had reportedly not played in the rain for over 30 years.
Georgia looked more comfortable from the start and they opened the scoring in the seventh minute after inside centre Irakli Giorgadze burst through the Namibian midfield.
Namibia infringed at the resulting ruck and fly-half Kvirikashvili, who plays for French second division side Pau, landed the penalty.
Namibia were struggling to get into the game and when they failed to find touch Malkhaz Urjukashvili counter attacked and took Georgia deep into Namibia territory.
After a couple of phases they moved the ball to Kvirikashvili but his grubber kick between the posts ran dead before any of the Georgian chasers could get to it.
The fly-half missed a second penalty after 23 minutes but two minutes later he was on target to give them a 6-0 lead.
Georgia rarely looked threatened but right winger Giorgi Shkinin's inability to cope with any ball kicked at him was proving a handicap.
When he dropped his third kick in a row it put the Eastern Europeans in deep trouble and they conceded a penalty for holding on at a ruck.
We don't even know what to expect of our celebrations. It's our first victory - we're amateurs at winning
Georgian flanker Rati Urushadze
It was the first time Namibia had had a sniff of any points but fly-half Tertius Losper pushed his kick wide.
Georgia were soon back on the attack and they took a decisive grip on the game when hooker Guiorgadze drilled his way over from close range after a pulverising drive by the Lelos pack.
Kvirikashvili converted to give Georgia a commanding 13-0 lead at the break and although he missed a penalty early in the second half they continued to dominate both territory and possession.
It took Namibia 20 minutes to get out of their half but their brief flurry came to nothing as they become just the fourth team - after England, Romania and Scotland - to fail to trouble the scorers in the tournament.
A third penalty from Kvirikashvili put Georgia 16-0 ahead and he added the conversion after Machkhaneli scored a superb solo try.
The powerful Georgia left wing hit Namibia full-back Heini Bock with a thunderous tackle before picking up the loose ball and racing clear to score under the posts.
Namibia tried to end the match on a high but their adventure played into the hands of outside centre Kacharava, whose interception try ensured they would be dancing in the streets of Tblisi.
Georgia coach Malkhaz Cheishvili:
"Our goal was to win a match and the players gave it absolutely all they had.
"They made Georgia proud and showed that Georgian rugby has a future.
"There's no question of letting go. This will have freed us mentally and we will give our best against France."
Georgian flanker Rati Urushadze:
"This day is the best day yet for Georgian rugby, and all of Georgia.
"We don't even know what to expect of our celebrations. It's our first victory - we're amateurs at winning!"
Namibia coach Hakkies Husselman:
"From the start we just couldn't run the game we wanted.
"We have to go back to the drawing board, but today we were beaten by the better team.
"Georgia just played better rugby on the day. We did not have that possession and the little we had, we did not use.
"Now we will regroup. We need assistance and money to keep improving but we will be back."
Georgia: Urjukashvili, Machkhaneli, Kacharava, I. Guiorgadze, Shkinin, Kvirikashvili, Abusseridze, Shvelidze, A. Guiorgadze, Zirakashvili, Datunashvili, Gorgodze, Labadze, Urushadze, Chkhaidze.
Replacements: Khinchagishvili, Kopaliana, Didebulidze, Udesiani, Samkharadze, Gigauri, Khamashuridze.
Namibia: Bock, Witbooi, van Zyl, Powell, Langenhoven, Schreuder, van Tonder, Lensing, Horn, Visser, Kazombiaze, Senekal, Nieuwenhuis, Burger, du Plessis.
Replacements: Meyer, Redelinghuys, du Toit, Esterhuize, Jantjies, Africa, Kamonga.