Half-Life's combined maps

This is a very simple guide that explains which Half-Life maps are combined in Sven Co-op

Introduction

Sven Co-op was originally a mod for the original Half-Life, but became it's own standalone game.
Sven runs on a modified version of the Goldsrc engine, called Svengine.
Svengine allows for much larger maps than Goldsrc, so Sven combines a lot of maps from the OG
Half-Life.
So this guide tells you which maps were combined with other maps.

The Maps

-hl_c00 - c0a0, c0a0a, c0a0b, c0a0c, c0a0d, c0a0e (Black Mesa Inbound)
-hl_c01_a1 - c1a0, c1a0d, c1a0a, c1a0b (Anomalous Materials)
-hl_c01_a2 - c1a0e (Anomalous Materials)
-hl_c02_a1 - c1a0c, c1a1, c1a1a, c1a1f (Unforeseen Consequences)
-hl_c02_a2 - c1a1b, c1a1c, c1a1d (Unforeseen Consequences)
-hl_c03 - c1a2, c1a2d, c1a2a, c1a2b, c1a2c (Office Complex)
-hl_c04 - c1a3, c1a3d, c1a3a, c1a3b, c1a3c (We've Got Hostiles)
-hl_c05_a1 - c1a4, c1a4k (Blast Pit)
-hl_c05_a2 - c1a4b, c1a4i, c1a4d, c1a4e, c1a4f (Blast Pit)
-hl_c05_a3 - c1a4g, c1a4j (Blast Pit)
-hl_c06 - c2a1, c2a1b, c2a1a (Power Up)
-hl_c07_a1 - c2a2, c2a2a, c2a2b2, c2a2b1, c2a2c (On A Rail)
-hl_c07_a2 - c2a2d, c2a2e, c2a2f, c2a2g, c2a2h (On A Rail)
-hl_c08_a1 - c2a3, c2a3a (Apprehension)
-hl_c08_a2 - c2a3b, c2a3c, c2a3d, c2a3e (Apprehension)
-hl_c09 - c2a4, c2a4a, c2a4b, c2a4c (Apprehension)
-hl_c10 - c2a4d, c2a4e, c2a4f, c2a4g (Questionable Ethics)
-hl_c11_a1 - c2a5, c2a5w, c2a5x (Surface Tension)
-hl_c11_a2 - c2a5a, c2a5b, c2a5c (Surface Tension)
-hl_c11_a3 - c2a5d (Surface Tension)
-hl_c11_a4 - c2a5e (Surface Tension)
-hl_c11_a5 - c2a5f, c2a5g (Surface Tension)
-hl_c12 - c3a1, c3a1a, c3a1b (Forget About Freeman)
-hl_c13_a1 - c3a2e, c3a2 (Lambda Core)
-hl_c13_a2 - c3a2a, c3a2b (Lambda Core)
-hl_c13_a3 - c3a2c, c3a2f (Lambda Core)
-hl_c13_a4 - c3a2d (Lambda Core)
-hl_c14 - c4a1 (Xen)
-hl_c15 - c4a2, c4a2a, c4a2b (Gonarch's Lair)
-hl_c16_a1 - c4a1a (Interloper)
-hl_c16_a2 - c4a1b (Interloper)
-hl_c16_a3 - c4a1c, c4a1d, c4a1e (Interloper)
-hl_c16_a4 - c4a1f (Interloper)
-hl_c17 - c4a3 (Nihilanth)
-hl_c18 - c5a1 (Endgame)