The 1d20 swingyness problem was noted in the boardgame "runebound". In the second edition, they changed to 2d10 (and adjusted the bonuses accordingly).
If anyone wants to use critical hits (and fumbles) using 2d10, the 5% value lies between 18 and 19 and between 5 and 4. In other words, an 18 or more would be like rolling a 20. (Actually a 6% chance rather than 5%).
If anyone wants to use critical hits (and fumbles) using 2d10, the 5% value lies between 18 and 19 and between 5 and 4. In other words, an 18 or more would be like rolling a 20. (Actually a 6% chance rather than 5%).