You can buy additional stat points using the in-game menu.
Open the "D" menu, go to page 2 and select the number of stat points you want to buy.
- Cost: depends on the number of stat points.
- Benefit: instantly boost your character's stats without extra leveling.
Notes:
- The maximum number of purchased stat points is 2000.
- After each reset, their number is reduced by 200.
Warning: the game does not ask for confirmation after you click Buy. Be careful!