Lines Free by Nestor Yavorskyy

Lines Free is a Numberlink-based puzzle game involving finding paths to connect colored tiles in a grid.

• Completely free
• 25 brain-teasing Numberlink puzzles
• beautiful abstract design
• 8 ambient relaxing soundtracks
• 100 achievements
• 15 Trading Cards, Badge, Emoticons and Backgrounds in paid version (Coming soon)
• Cross-platform saves via Steam Cloud
• Windows, Mac & Linux
• Paid version - Lines
• Infinite fun - Lines Infinite
• Free DLCs with community-generated achievements

Source:

Steam Store Description