Shareware is not fully free. Creators expect payment if you continue using it after the trial. The game is shareware, so I'll have to pay if I keep playing after the trial ends.
Pro Tip 2/3
Limited Features
The initial download may have limited features. Full features are unlocked after purchase. The shareware version only lets me save files in low quality.
Pro Tip 3/3
Time-Constrained
Shareware usually has a time limit, often 30 days, before you must pay or stop using it. My shareware antivirus expires next week.