Yep, you can blame me. Or my latest infatuation with the genius OSR system called GLOG and its many variants. Into the Odd still is one of my favorite systems, ever. And I keep tinkering with it because it invites me to do so.
- Establish initiative.
- Attacker rolls on or under 10+STR mod (=Strength/3 minus 3) to hit with d20
- Defender rolls on or under 10+armor*2+DEX mod (=Dexterity/3 minus 3) to defend with d20
- Compare successful rolls: higher roll wins (if attacker wins, he rolls damage; if defender wins, he defends successfully)