To get The Hunt Roblox 20 Lumber Tycoon 2 Badge & UGC, you need to do the following:
1. Complete the minigame in the hub by interacting with the Berezaa NPC and clicking the glowing green button on the conveyor belt
2. Go through the portal and turn left from the store to talk to the Geck NPC
3. To complete the challenge, walk back to the store and purchase the Hatchet
4. Collect 20 pieces of wood by chopping trees and max the bin meter
5. Walk back through the portal to the main hub and collect the Leather Adventure Backpack and You Helped Geck Badge
Want to know how to get the Leather Adventure Backpack and become the proud owner of You Helped Geck Badge? Great! Read our guide on how to get the Hunt Roblox 20 Lumber Tycoon 2 Badge & UGC and complete the 2015 Challenge.
How To Start The Hunt Roblox 20 Challenge For Lumber Tycoon 2

Upon entering the hub you'll have to interact with a Berezaa NPC next to a conveyor belt to start off your adventure. He tells you that he needs fresh ore, and once you click the glowing green button, you're thrown in the machine for processing. As simple as it sounds, this step is necessary to get the 2 badges and UGC for the 2015 Lumber Tycoon 2 challenge.
How To Gather Wood in The Roblox 20 Challenge For Lumber Tycoon 2

Once you're done with the hub minigame it's time to hop into the portal for Lumber Tycoon 2, and start the actual quest. As soon as you spawn, you'll see a big store with a beard sign. When you get close enough to the door of the shop, you'll see a red sign telling you to go left and see Geck NPC. The NPC tells you that he needs wood and this is when the challenge actually begins. There is a bin next to the Geck NPC and a small red arrow in the front, that tells you how full the wood meter is. You need to stack the bin with 20 pieces to max out the meter.

To be able to chop wood and complete the challenge properly, you'll need to go back to the store with the beard sign and purchase a Hatchet. This is pretty simple to do, all you need is to walk over to the raft and collect the box containing this item. Then, walk to the cash register and talk to the Cashier Tom NPC, then purchase it for 12 in game currency that you get automatically at the start. Upon buying it, to actually get the hatched in your inventory, you need to press 'E' to first Open the box, and then again to Pick up Basic Hatchet.
The time has finally come to chop wood. Simply walk all around the map and search for trees to cut down. A word of advice, don't waste time with interacting with random wood pieces as you cannot use them fill out the wood meter. These pieces are from other players, you actually got to do the chopping yourself. Another useful tip is to cut down the entire tree and unequip your hatched to carry the whole item to the Geck NPC's bin. This way you avoid going back and forth multiple times, since you can't carry multiple pieces at once. As previously mentioned, once you gather the wood, simply interact with the bin and store it inside. Each added piece will move the meter.
How to Get The Leather Adventure Backpack & You Helped Geck Badge in Lumber Tycoon 2

After successfully collecting 20 pieces of wood, you have to go back through the portal to the main hub. Right next to the portal you'll see the option to claim UGC and the Leather Adventure Backpack, make sure to get these goodies before advancing to the next year's challenges as you aren't able to proceed without finishing this step.
If you like a good blast to the past with a seasoning of nostalgia make sure to check out How to Get The Hunt Roblox 20 Work At A Pizza Place Badge & UGC – 2010 Challenge and The Hunt Roblox 20 Natural Disaster Survival UGC & Badge Guide – 2011 Challenge.