Boondoggle, it's like Alloy but worse.
Boondoggle uses the gravelpit/steel type gamemode mix Yrr made for Alloy. Capture point A OR B to unlock C. Capping 1 extends the bridge to C. Capturing both points opens the upper one way doors for blu to get highground at C.
Also there was another map called Boondoggle but it was payload instead of Capture Point. It also hasn't seen an update since around '08 and doesn't seem to have a download available. Due to that I felt it was safe to use the name.
Asym2 Boondoggle b19
Like Alloy but Worse