When you complete the following tasks you will unlock the corresponding character in the shop.

Angel:
Score 150 or chop 3,000 logs using Timber Claws.

Baldhead:
Score 200 or chop 3,000 logs.

Bruce Tree:
Win 5 rounds in a row.

Bulk:
Score 650 or chop 55,000 logs.

Cleaner:
Score less than 44 with 20 characters.

Climber:
Climb 100 positions in multiplayer rank in 24 hours.

Dr. Jones:
Score 550 or chop 40,000 logs.

Dwarf:
Score over 500 three times in a row.

Eddie:
Score 444 or chop 6,969 logs.

Elf:
Score 250 or chop 5,000 logs using Timber Claws.

Eskimo:
Launch the game 24 times.

Flockey:
Score over 300 three times in a row.

Fred Treegger:
Lose 2 first rounds, then win the match in online multiplayer.

Freedom Tim:
Score 333 in online multiplayer.

Gaben:
Score 2,000 or chop 999,999 logs.

Green Shirt:
Score 100 or chop 1,000 logs.

Hazmat:
Score 350 or chop 7,000 logs.

Jason:
Score 400 or chop 10,000 logs.

Lazy Bird:
Score 700 or chop 100,000 logs.

Lucha Timbre:
Defeat 5 opponents in row in online multiplayer.

Mage:
Score 777 or chop 77,777 logs

Mr. Kevin:
Play 7 or more rounds 10 times in online multiplayer.

Mr. President:
Score over 600 three times in a row.

Mr. Tree:
Score 500 or chop 30,000 logs.

Ninja:
Score 555 or chop 55,555 logs.

Olaf:
Score 600 or chop 50,000 logs.

Reindeer:
Score 350 or chop 7,500 logs using Timber Claws.

Sasquatch:
Play a game 50 times as Trapper & Wolf.

Scrooge:
Score 567 or chop 12,345 logs

Sir Tim:
Score over 400 three times in a row.

Sitting Wolf:
Score 400 or chop 9,000 logs.

Snowman:
Score 450 or chop 10,000 logs using Timber Claws.

Sweetie:
Chop 200 logs in 29 seconds.

Tim Bear:
Play multiplayer once.

Tim Beardy:
Score 376 or chop 28,430 logs.

Timb-nerd:
Play the game for 12 hours, 1 minute.

Timber Death:
Score over 300 in single player mode.

Timber Hook:
Play Friday between 1:00 PM and 2:00 PM.

Timber Lord:
Score 100 with 16 characters.

Timber Santa:
Play multiplayer once.

Timberbot:
Launch the game 49 times.

Timberboy:
Score 150 or chop 2,500 logs.

TimberGirl:
Score 250 or chop 4,000 logs.

Timberius:
Score 444 or chop 44,444 logs.

Trapper:
Score 300 or chop 5,000 logs.

Treedevil:
Raise your energy bar from the minimum to the maximum in online multiplayer.

Uncle:
Play multiplayer once.

Worker:
Score 450 or chop 20,000 logs.

Zomtree:
Score over 100 in three rounds in Timbermill.